🛂 AncestorPass
🇮🇪 Ireland · Citizenship by descent
Irish citizenship by descent — do you qualify?
Millions of people qualify for an Irish passport through a parent or grandparent born in Ireland — many without knowing it. Here are the rules as they stand in 2026, in plain English.
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Who qualifies
Irish law recognises three main descent routes:
- A parent born on the island of Ireland (including Northern Ireland): you are automatically an Irish citizen from birth — you can apply for a passport directly, no registration needed.
- A grandparent born on the island of Ireland: you're entitled to register on the Foreign Births Register (FBR). Once registered, you're an Irish citizen and can apply for a passport. Crucially, this works even if your parent never registered.
- A parent who was an Irish citizen at the time of your birth (for example through their own FBR registration made before you were born), even if nobody was born in Ireland.
Who usually doesn't qualify
If your closest Irish-born ancestor is a great-grandparent, you only qualify if your parent had already been registered on the FBR before you were born. FBR citizenship is not retroactive — each generation must register before the next is born to keep the chain alive. This timing rule is the single most common reason great-grandchild claims fail.
Documents you'd need
- Your Irish-born ancestor's civil birth certificate from Ireland's General Register Office (church records alone aren't sufficient)
- Birth certificates linking each generation — your parent's and your own
- Marriage certificates wherever a name changed between documents
- Certified photo ID, proofs of address, and witnessed photos for the FBR application
Not sure what you have? Our checker asks about documents as you go and tells you where to order anything missing.
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Not sure where your family fits? Our AI interviewer walks through your family history question by question, applies the current Irish rules, and builds a downloadable timeline of your claim.
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Frequently asked questions
Can I get Irish citizenship through my grandmother or grandfather?
Yes. If your grandparent was born anywhere on the island of Ireland, you can register on the Foreign Births Register today — regardless of whether your parent ever registered. Citizenship takes effect from your registration date.
My great-grandparent was born in Ireland. Do I qualify?
Only if your parent had been registered on the Foreign Births Register before you were born. If they weren't, the entitlement didn't pass to you — though your parent may still be able to register now, which would cover children born after their registration.
Do I need to live in Ireland or speak Irish?
No. The descent route has no residence, language, or naturalisation-style test. It's a recognition of citizenship you're already entitled to.
Is Foreign Births Register citizenship backdated to my birth?
No — it takes effect from the date of registration. That's why registering before your own children are born matters: it's what lets them claim through you.