Estonia citizenship by descent allows individuals with Estonian heritage to claim citizenship through direct parental connections. 

Unlike many other European countries with generous multi-generational programs, Estonia's citizenship by descent is strictly limited to one generation - meaning you can only claim through parents who were Estonian citizens at the time of your birth. 

This highly restrictive approach reflects Estonia's careful management of citizenship and its emphasis on maintaining close cultural and familial ties to the country.

What Does "Estonia Citizenship by Descent" Mean?

Estonia citizenship by descent refers to the legal process that allows individuals born to Estonian parents to claim Estonian citizenship based on their direct parental connection. This pathway is governed by the jus sanguinis principle (right of blood), which means citizenship is transmitted through bloodline rather than birthplace.

Estonian nationality law is based on the Citizenship Act of 1995 (which came into force on April 1, 1995), establishing that children born to at least one Estonian parent automatically acquire Estonian citizenship at birth, regardless of where they were born.

Critical limitation: Estonia allows citizenship by descent only through parents, not through grandparents or more distant ancestors. This makes Estonia's program one of the most restrictive in Europe.

Dual citizenship restrictions: Estonia generally does not allow dual citizenship for those who naturalize. However, children born to Estonian parents can hold dual citizenship by birth, and this dual status is protected under Article 8 of the Constitution, which states that Estonian citizenship acquired by descent is inalienable and cannot be involuntarily revoked.

As an Estonian citizen, you gain all the rights and privileges of EU citizenship, including:

  • The right to live, work, and study anywhere in the 27 European Union member states
  • Access to a powerful passport with visa-free travel to 179+ destinations
  • Full healthcare and education benefits across Europe
  • The ability to pass citizenship to your children automatically

Historical Background and Context

Estonia's citizenship laws are deeply shaped by its tumultuous 20th-century history, particularly the Soviet occupation that lasted nearly 50 years.

First Independence (1918-1940): Estonia declared independence on February 24, 1918, after centuries of foreign rule. The first Citizenship Law was adopted in 1922, establishing citizenship principles based on jus sanguinis. The Republic of Estonia existed as an independent nation until June 16, 1940, when it was occupied by the Soviet Union.

Soviet Occupation (1940-1991): On June 16, 1940, the Soviet Union occupied Estonia. From 1940-1941 and 1944-1991, Estonia was considered part of the USSR by Soviet authorities, and all local residents were deemed Soviet citizens. During this period:

  • Estonian citizenship effectively ceased to exist internationally
  • Hundreds of thousands of Estonians fled or were deported
  • Soviet authorities imposed their own citizenship framework
  • The international community largely viewed the occupation as illegal

Restoration of Independence (1991-Present): Estonia restored independence in 1991, becoming one of the first Soviet republics to break away. The restoration brought complex citizenship questions:

The citizenship restoration policy: Estonia restored citizenship to those who were citizens of the Republic of Estonia before June 16, 1940, and their descendants. This policy meant that Soviet-era immigrants and their children were not automatically granted Estonian citizenship but had to naturalize.

Statelessness issue: Initially, almost 30% of Estonia's population had no citizenship, creating significant statelessness. Estonia addressed this by:

  • Granting citizenship restoration to pre-1940 citizens and descendants
  • Creating "undefined citizenship" status (Estonian alien's passport holders)
  • Establishing naturalization pathways requiring 8 years residence and language proficiency
  • Implementing automatic citizenship for children born to non-citizen parents (reduced child statelessness)

Current citizenship framework: The Citizenship Act of 1995 governs modern Estonian citizenship, establishing clear pathways through birth, descent, naturalization, and special restoration provisions.

Major Estonian emigration destinations:

  • United States: Significant Estonian-American communities, particularly from pre-WWII and post-WWII waves
  • Canada: Large Estonian communities in Toronto and other major cities
  • Sweden: Major destination for WWII refugees
  • Australia: Post-WWII Estonian immigration
  • Germany, United Kingdom, and other Western nations

Important historical dates:

  • 1918: Estonia declares independence, first citizenship framework
  • 1922: First Citizenship Law adopted
  • June 16, 1940: Soviet occupation begins (critical date for restoration claims)
  • 1991: Independence restored
  • April 1, 1995: Current Citizenship Act enters into force
  • 2004: Estonia joins the European Union

Who Qualifies for Estonian Citizenship by Descent?

Estonian citizenship by descent has extremely limited eligibility compared to most European countries. You can only claim citizenship through direct parental connection.

You are entitled to Estonian citizenship by descent if:

  1. At least one of your parents was an Estonian citizen at the time of your birth (regardless of where you were born)
  2. You were born after your father's death, and your father was an Estonian citizen at the time of his death

That's it. Estonia does not extend citizenship by descent to grandchildren or more distant descendants.

Generational limit: Estonia allows descent only through the first generation (parents). You cannot claim through grandparents, great-grandparents, or any more distant ancestors.

Conditions for Eligibility

The Parental Citizenship Requirement

The fundamental requirement is straightforward but strict: at least one of your parents must have been an Estonian citizen at the time of your birth.

What this means:

  • Your parent held Estonian citizenship when you were born
  • It doesn't matter where you were born (Estonia or abroad)
  • It doesn't matter if your parent later renounced Estonian citizenship
  • You acquired Estonian citizenship automatically at birth by operation of law

What this doesn't mean:

  • Having Estonian grandparents does NOT qualify you
  • Having Estonian great-grandparents does NOT qualify you
  • Having Estonian ancestry further back does NOT qualify you

Special Case: Estonian by Birth (Pre-1940 Citizens)

There is a special restoration pathway for individuals who were Estonian citizens before June 16, 1940 (when Soviet occupation began), and their descendants.

Eligibility for restoration:

  • You or your ancestors were Estonian citizens before June 16, 1940
  • You lost citizenship due to Soviet occupation
  • This pathway can extend to descendants (children, potentially grandchildren in some cases)

Key difference: This is citizenship restoration, not citizenship by descent through the normal pathway. It's a special provision recognizing the illegal Soviet occupation.

Requirements for restoration claims:

  • Proving your ancestor was an Estonian citizen before June 16, 1940
  • Proving you are a direct descendant
  • No standard residency or language requirements (unlike naturalization)

Understanding Dual Citizenship Rules

Estonia's dual citizenship rules are complex and depend on how you acquired citizenship:

You CAN hold dual citizenship if:

  1. You acquired Estonian citizenship by birth (through Estonian parent)
  2. You are a child of parents holding different citizenships
  3. Your Estonian citizenship is a basic right by blood (jus sanguinis)

Article 8 of the Constitution: "No one may be deprived of Estonian citizenship acquired by birth." This constitutional protection means:

  • Estonian citizenship by descent is inalienable
  • You cannot lose it involuntarily
  • You can hold other citizenships simultaneously

You generally CANNOT hold dual citizenship if:

  • You acquire Estonian citizenship through naturalization (must renounce previous citizenship)
  • You are naturalizing as an adult immigrant

Important clarification: There's a persistent myth that children with one Estonian parent and one foreign parent must "choose" citizenship at age 18. This is false. Children who acquired Estonian citizenship by birth (jus sanguinis) cannot lose it and will remain dual citizens for life.

Critical distinction:

  • First-generation immigrants: Naturalized citizens face dual citizenship restrictions
  • Second-generation and beyond: Considered "Estonian by blood" and can hold multiple citizenships

What If Your Parent Revoked Your Citizenship Before Age 18?

There is a special provision for this scenario:

You can reapply for Estonian citizenship if:

  • You were born to Estonian parents
  • Your parents revoked your Estonian citizenship before you turned 18
  • You now wish to reinstate it as an adult

This provision recognizes that minors cannot make citizenship decisions for themselves.

The Grandparent Problem

You CANNOT claim Estonian citizenship through grandparents alone. This is the most significant limitation of Estonia's program.

Why this matters:

  • Many European countries (Ireland, Poland, Italy, Lithuania, Latvia) allow claims through grandparents or even great-grandparents
  • Estonia's restriction to parents only means most diaspora descendants are ineligible
  • Your Estonian grandparent would need to have transmitted citizenship to your parent first

Example scenario:

  • Your grandmother was Estonian and left Estonia in 1935
  • She had your mother in Canada in 1950
  • At that time, your grandmother was no longer an Estonian citizen (had naturalized as Canadian)
  • Your mother did NOT acquire Estonian citizenship at birth
  • Therefore, you CANNOT claim Estonian citizenship

The chain must be unbroken: Each generation must have actually held Estonian citizenship at the time the next generation was born.

Required Documents

Obtaining Estonian citizenship by descent requires proving your identity and your direct parental connection to an Estonian citizen.

Your Personal Documents

Core identity documents:

  • Current valid passport
  • Your original birth certificate (showing both parents)
  • Proof of current address
  • Marriage certificate (if applicable and name changed)

Proving Your Parent's Estonian Citizenship

The critical requirement is proving your parent was an Estonian citizen when you were born.

Acceptable evidence:

Primary documents (strongest proof):

  • Your parent's Estonian passport (issued before or around the time of your birth)
  • Your parent's Estonian identity card
  • Your parent's Estonian birth certificate (if they were born in Estonia)
  • Official documents from Estonian authorities confirming citizenship status

Secondary documents:

  • Estonian military service records
  • Estonian school records
  • Estonian residence registration documents
  • Documents from Estonian National Archives

What If Documents Are Missing?

Estonian National Archives can help:

The Estonian National Archives conduct research to locate historical documents proving citizenship. Research can be based on:

  • Defense forces service
  • Land ownership records
  • Passport records
  • Church baptism records
  • Birth, marriage, death registers

Important note: Research conducted under a male ancestor's name has a higher probability of success due to historical record-keeping practices.

Where to request documents:

Estonian National Archives:

  • General historical records and citizenship documentation
  • Documents related to persons who departed Estonia by 1926

Tallinn City Archives:

  • Church baptism records for Tallinn and North Estonia

Tartu Historical Archives:

  • Church baptism records for South Estonia region

Important: A birth certificate alone is not sufficient to prove Estonian citizenship. You need actual proof of citizenship status (passport, ID card, or official citizenship confirmation).

Proving Your Lineage

You need to establish the direct connection between you and your Estonian parent:

Required documents:

  • Your birth certificate showing your parent's name
  • Your parent's birth certificate
  • Marriage certificates (if name changes occurred)
  • Any legal name change documents

Document Authentication

All foreign documents must be properly authenticated for use in Estonia:

Apostille Requirements:

  • All foreign documents must be validated by Apostille
  • Documents from Hague Convention countries need an Apostille from the competent authority
  • In the U.S., contact the Secretary of State of the issuing state

Translation Requirements:

  • All foreign documents must be officially translated into Estonian
  • Translations must be completed by certified translators
  • Both original apostilled documents and certified translations must be submitted

Where to get Apostilles:

United States:

  • State documents: Secretary of State of the issuing state
  • Federal documents: U.S. Department of State
  • Processing: Varies by state (typically 1-3 weeks)
  • Cost: Typically $5-30 per document

United Kingdom:

  • Foreign, Commonwealth & Development Office (FCDO)
  • Processing: 3-4 weeks
  • Cost: £30 per document

Canada:

  • Global Affairs Canada
  • Processing: 10-20 business days
  • Cost: CAD $50 per document

Australia:

  • Department of Foreign Affairs and Trade (DFAT)
  • Processing: 10-15 business days
  • Cost: AUD $80 per document

The Application Process

Step 1: Determine Your Eligibility

Before beginning, honestly assess whether you qualify:

Key questions:

  • Was at least one of your parents an Estonian citizen when you were born?
  • Do you have documentation proving your parent's Estonian citizenship?
  • Can you prove your direct connection to that parent?

If you answer "yes" to all three, you likely qualify for Estonian citizenship by descent.

If your closest Estonian ancestor is a grandparent or more distant: You do NOT qualify under the standard descent provisions. You would need to explore:

  • The special restoration pathway for pre-1940 citizens
  • Standard naturalization after 8 years of residence

Step 2: Gather Information About Your Parent

Collect information about your Estonian parent:

Helpful details:

  • Full name (in your country and in Estonia)
  • Date and place of birth
  • Estonian passport or ID card details
  • When they left Estonia (if applicable)
  • When they acquired citizenship of another country (if applicable)

Step 3: Obtain Proof of Your Parent's Estonian Citizenship

This is the most critical step.

If your parent has Estonian documents:

  • Request copies of their Estonian passport or ID card
  • Obtain their Estonian birth certificate

If documents are lost or unavailable:

  • Contact the Estonian National Archives for research
  • Provide as much information as possible about your parent
  • Request archival search for citizenship documentation

Professional genealogists specializing in Estonian records can assist with this research, though it may be challenging for records from the Soviet period.

Step 4: Obtain Your Birth Certificate

Get your birth certificate:

  • Must show both parents' names
  • Must be original or certified copy
  • Will need apostille and translation

Step 5: Authenticate and Translate

Get apostilles:

  • Submit all foreign documents for apostille certification
  • Ensure apostilles are from the correct issuing authority

Translate to Estonian:

  • Have all documents officially translated into Estonian by certified translators
  • Ensure translations are complete and accurate
  • Translator should be recognized by Estonian authorities

Step 6: Submit Application

Applications are submitted to Estonian authorities either in Estonia or through Estonian diplomatic missions abroad.

Application options:

Option 1: In Estonia

  • Submit application at any Service Office of the Police and Border Guard Board
  • Make reservation online before submitting
  • Bring all original documents, translations, and apostilles

Option 2: Through Estonian Embassy/Consulate abroad

  • Schedule appointment at nearest Estonian diplomatic mission
  • Bring all original documents, apostilles, and translations
  • Embassy forwards application to Estonia

Application must include:

  • Completed application form (in Estonian)
  • Your identity documents
  • Proof of your parent's Estonian citizenship
  • Your birth certificate showing parental connection
  • All required translations and apostilles
  • Application fee payment

Step 7: Wait for Decision

Processing timeline:

  • Standard processing: Typically completed within 1-2 months from registration
  • Complex cases requiring archive research: Up to 1 year
  • Restoration cases (pre-1940): Variable timing

During processing:

  • Authorities review all documents
  • May verify information with Estonian archives
  • May request additional documentation
  • Communication typically through embassy/consulate or directly if in Estonia

Step 8: Receive Citizenship Confirmation

Once approved:

  1. You receive official confirmation of Estonian citizenship
  2. You can apply for Estonian passport and ID card
  3. Register with Estonian authorities (population register)
  4. Full EU citizenship rights begin immediately

Passport application:

  • Apply at Police and Border Guard Board office in Estonia or Estonian embassy
  • Provide biometric photo and fingerprints
  • Standard processing: 30 days (€40)
  • Expedited processing: 2 days (€58) - only available in Estonia
  • Estonian passport valid for 10 years

Timeline and Costs

Realistic Timeline Breakdown

Total timeline: 3-12 months typical (depending on document availability)

Phase 1: Document Gathering (1-6 months)

  • Eligibility assessment: 1-2 weeks
  • Estonian archive research (if needed): 2-6 months
  • Foreign document gathering: 2-4 weeks
  • Document authentication and translation: 3-6 weeks

Phase 2: Application Submission (1-2 weeks)

  • Application preparation: 1 week
  • Embassy appointment scheduling: 1-2 weeks
  • Document submission: 1 day

Phase 3: Government Processing (1-2 months standard)

  • Standard processing: 1-2 months from registration
  • Complex cases: Up to 12 months

Phase 4: Passport Application (1 month)

  • After citizenship confirmation: 30 days standard processing

Cost Breakdown

DIY Route (if attempting independently):

  • Estonian archive research (if needed): €200-1,000
  • Foreign vital records: $50-200
  • Apostilles: $50-200
  • Official Estonian translations: €100-400
  • Application fees: Minimal
  • Passport application: €40 standard / €58 expedited
  • Total: €500-2,000 (depending on document availability)

With Professional Services:

  • Genealogy research: €500-2,000
  • Document procurement: €300-1,000
  • Legal consultation: €500-2,000
  • Translations and apostilles: €200-500
  • Application management: €500-1,500
  • Total: €2,000-7,000 depending on case complexity

Much lower costs than other European programs because eligibility is straightforward (either your parent was Estonian or not) and doesn't require extensive multi-generational research.

9 Benefits of Estonian Citizenship

1. European Union Citizenship

Estonian citizenship automatically grants you European Union citizenship, providing:

Freedom of movement to live, work, and study in any of the 27 EU member states without visas or permits.

Countries included: Germany, France, Spain, Netherlands, Sweden, Denmark, Ireland, Italy, Portugal, Austria, Belgium, Poland, and 15 others.

No sponsorship needed: Accept any job in any EU country without employer sponsorship or work permits.

Business freedom: Start a business anywhere in the EU with full access to the European single market.

2. Powerful Digital Nation Passport

The Estonian passport allows visa-free travel to 179+ destinations.

Visa-free access includes:

  • All EU countries (27)
  • United States (ESTA, 90 days)
  • Canada (eTA, 6 months)
  • United Kingdom (6 months)
  • Japan (90 days)
  • Australia (eTA, 90 days)
  • Most of South America
  • Most of Asia

The Estonian passport consistently ranks in the top 15-20 most powerful passports globally.

3. World's Most Advanced Digital Society

Estonia is globally recognized as the most digitally advanced nation:

  • e-Residency program: Estonia pioneered digital residency for global entrepreneurs
  • 99% of government services online: Tax filing, voting, prescriptions, business registration all digital
  • Blockchain-secured: Government systems use blockchain technology for security
  • Digital signatures: Legally binding digital signatures since 2000
  • Fast internet: Some of the fastest internet speeds in Europe

4. Thriving Tech and Innovation Hub

Estonia offers exceptional opportunities for tech professionals and entrepreneurs:

  • 10 unicorn companies: Highest per capita in Europe (Skype, Wise, Bolt, Pipedrive, etc.)
  • Highest startup density: Most startups per capita in Europe
  • E-residency for business: Run an EU business remotely with Estonian digital infrastructure
  • Favorable tax environment: 0% corporate tax on reinvested profits
  • English widely spoken: Especially in tech and business sectors
  • NATO and EU member: Political stability and international integration

5. Education Benefits

As an EU citizen with Estonian citizenship:

  • Free higher education in Estonia: University education is tuition-free in Estonian for citizens
  • High-quality education system: Consistently ranks at top of PISA scores globally
  • EU-wide access: Study anywhere in the EU at domestic student rates
  • English-language programs: Many programs taught in English

EU tuition examples:

  • Estonia: Free for Estonian-language programs, €1,500-7,500/year for English programs
  • Germany: Often free for undergraduate programs
  • France: €170-600/year at public universities
  • Scandinavia: Free in several countries

6. Healthcare Access

Estonian National Health System: Comprehensive universal healthcare coverage for residents.

European Health Insurance Card (EHIC): When traveling in the EU, receive necessary healthcare at local prices.

Modern digital healthcare:

  • 99% of medical records digitized
  • E-prescriptions standard
  • Remote consultations widely available
  • High-quality medical care

7. High Quality of Life

Estonia offers exceptional quality of life:

  • Clean environment: 50% of country covered in forest
  • Safe country: Low crime rates, high personal safety
  • Medieval charm: UNESCO-listed Tallinn Old Town
  • Baltic coastline: Beautiful beaches and nature
  • Four distinct seasons: Snowy winters, warm summers
  • Affordable cost of living: Much lower than Western Europe

8. Dual Citizenship Permitted (By Birth)

Estonia allows dual citizenship for those who acquire it by birth. If you qualify for Estonian citizenship by descent, you can retain your current citizenship.

Compatible with:

  • United States (U.S. recognizes dual citizenship)
  • Canada (Canada permits dual citizenship)
  • United Kingdom (UK allows dual citizenship)
  • Australia (Australia permits dual citizenship)
  • Most countries worldwide

Constitutional protection: Estonian citizenship acquired by birth is protected by Article 8 of the Constitution and cannot be involuntarily revoked.

9. Passing Citizenship to Your Children

Automatic transmission: Any children you have are automatically entitled to Estonian citizenship if you are an Estonian citizen at the time of their birth, regardless of where they're born.

No generation limit: Your children can pass Estonian citizenship to their children, continuing the legacy indefinitely.

Dual citizenship for children: Children born with Estonian citizenship retain it even if they acquire another citizenship by birth.

Citizenship by Descent Programs

While Estonia's citizenship by descent program is extremely limited (parents only), many people with European heritage may qualify for citizenship through other ancestral lines. CitizenX offers comprehensive citizenship by descent services for several European countries with generous multi-generational ancestry programs.

CitizenX Citizenship by Descent Services

CitizenX specializes in helping individuals reclaim their European heritage through citizenship by descent programs. Our expert team navigates complex legal requirements, conducts genealogical research, and manages the entire application process from eligibility assessment to passport receipt.

Note: CitizenX does not currently offer Estonia citizenship by descent services due to the program's very limited scope (parents only). However, we offer full services for many other European countries with more generous programs.

Countries where CitizenX offers full citizenship by descent services:

Italy Citizenship by Descent - $25,000

  • No generational limit
  • Can claim through great-grandparents and beyond
  • 100% online process
  • Approximately 6 months to passport after recognition

Ireland Citizenship by Descent - $15,000

  • Claim through Irish-born parent or grandparent
  • Includes Foreign Births Register assistance
  • 100% online process
  • Approximately 9 months to passport

Poland Citizenship by Descent - $25,000

  • Can claim through multiple generations
  • Complex documentation from Polish archives
  • 100% online process
  • Approximately 8 months to passport

Lithuania Citizenship by Descent - $15,000

  • Claim through parents, grandparents, or great-grandparents
  • Lithuanian archive research included
  • Approximately 6 months to passport after approval

Each program includes complete eligibility assessment, comprehensive document research and retrieval, apostille and translation coordination, legal representation, application management, and dedicated 24/7 concierge support until passport receipt.

Why Choose CitizenX for Citizenship by Descent

  • Expert Knowledge: Our team specializes in European citizenship law and has helped over 11,500 clients successfully obtain their ancestral citizenship.
  • Comprehensive Service: We handle everything from genealogical research and archive documentation to legal representation and government liaison.
  • Time Savings: We manage the bureaucracy, document hunting, and complex legal requirements, saving you hundreds of hours of work.
  • Higher Success Rate: With proper documentation, legal expertise, and established relationships with government authorities, we maximize your chances of approval.
  • Proven Track Record: With 11,500+ citizens helped and counting, CitizenX has the experience and connections to make your application successful.
  • Explore CitizenX citizenship by descent programs to discover if you qualify for European citizenship through your ancestry.

Frequently Asked Questions

Can I claim Estonian citizenship through my grandparents?

No. Estonia only allows citizenship by descent through parents. If your grandparent was Estonian but your parent was not an Estonian citizen when you were born, you cannot claim Estonian citizenship through descent.

What if my parent was Estonian but naturalized as a citizen of another country?

If your parent was an Estonian citizen at the time of your birth, you acquired Estonian citizenship automatically, even if your parent later naturalized elsewhere. Estonian citizenship by birth cannot be involuntarily revoked.

Do I need to speak Estonian?

No language requirement exists for citizenship by descent. You automatically acquired citizenship at birth if your parent was Estonian. However, if you need to prove citizenship through archives, communication with authorities may require Estonian or English.

Can I hold dual citizenship?

Yes. Estonian citizenship acquired by birth (jus sanguinis) is constitutionally protected and allows dual citizenship. You can hold Estonian citizenship alongside other nationalities.

What if I was born in Estonia but my parents weren't Estonian?

Being born in Estonia does not automatically grant citizenship. Estonia follows jus sanguinis (citizenship by blood), not jus soli (citizenship by birthplace). You need at least one Estonian parent.

Can my spouse become Estonian through my citizenship?

No, your spouse cannot claim citizenship through your Estonian ancestry. They would need to qualify independently or through standard naturalization after living in Estonia for 8 years.

What about the pre-1940 restoration pathway?

If your ancestors were Estonian citizens before June 16, 1940, there may be a special restoration pathway available that extends beyond the parent-only limitation. This requires proving your ancestor's pre-1940 citizenship and researching Estonian National Archives.

How long does the process take?

If you have all required documents, standard processing is 1-2 months. If archive research is needed to locate your parent's citizenship documents, the process can take 6-12 months.

How much will this cost?

DIY approach costs €500-2,000 depending on whether archive research is needed. Professional genealogy and legal services cost €2,000-7,000 total.

Can my children get Estonian citizenship?

Yes. Children born to Estonian citizens automatically acquire Estonian citizenship at birth, regardless of where they're born. You can pass this valuable EU citizenship to future generations.

Why is Estonia's program so limited compared to other countries?

Estonia's restrictive one-generation policy reflects its post-Soviet approach to citizenship, emphasizing close family ties and preventing claims from distant diaspora descendants. Other countries like Ireland, Poland, and Lithuania have more generous multi-generational programs.

What if my parent is deceased?

You can still claim Estonian citizenship if your parent was an Estonian citizen at the time of your birth (or at the time of their death if you were born posthumously). You'll need to prove their citizenship through archival documents.

Is there any way to qualify beyond the parent limitation?

The only alternative pathway is the special restoration provision for pre-1940 citizens and their descendants, or standard naturalization requiring 8 years of residence in Estonia. Otherwise, Estonia's descent program is strictly limited to one generation.