For an Irish claim through the Foreign Births Register, the most important single document is your Irish-born grandparent’s birth record. Finding it — and the marriage and birth records that link that grandparent to you — is mostly a matter of knowing where to look, and much of it is free.
Start with what you need
A typical grandparent claim needs records for three generations:
- Your grandparent: their Irish birth certificate (or, before 1864, usually a baptism record) and their marriage record.
- Your parent: their birth certificate naming the Irish grandparent, and their marriage record.
- You: your own long-form birth certificate naming your parents.
The Irish citizenship guide covers the full requirements, and the document checklist covers getting official copies.
Free official sources
- IrishGenealogy.ie (civil records): Free images of historic Irish civil birth, marriage and death registers for the Republic. Births are registered from 1864 (non-Catholic marriages from 1845).
- IrishGenealogy.ie (1901 and 1911 census): The Irish government’s genealogy portal; the old census site now redirects here. The 1901 and 1911 household returns help place a family in a townland and estimate ages.
- National Library of Ireland: Catholic parish registers: Free images of Catholic baptism and marriage registers, mostly up to about 1880 — the main source for births before civil registration.
- GRONI (General Register Office for Northern Ireland): Historic births, marriages and deaths for Northern Ireland — relevant because a grandparent born anywhere on the island of Ireland counts for Irish citizenship.
- GRO England & Wales and FreeBMD: Free indexes of births, marriages and deaths in England and Wales; order certificates from the General Register Office.
- ScotlandsPeople: Scotland’s official records site for statutory registers, census and church records (pay-per-view).
Finding where your ancestor came from
Irish civil records are organised by registration district, so the hardest step is often learning where in Ireland your ancestor was born. Clues usually come from records in the country they moved to:
- Naturalization papers and ship manifests, which sometimes name a county or town.
- Death certificates and obituaries, which may give a birthplace or parents’ names.
- Church records of their marriage abroad, which often record the parish of origin — see our guide to church records.
Once you have a county and approximate year, search the civil and census records above for a matching name, parents and townland.
When paid sites help
The free official sites hold the core civil records, but subscription sites such as Findmypast and Ancestry add indexes and record sets that make the search easier — British and Irish newspapers, emigration and military records, and family trees built by other researchers. Findmypast in particular concentrates on British and Irish records and hosts the 1921 census of England and Wales. Many people use a free trial to find the key facts, then order official certificates from the government registries.
If you’re stuck
Common names, missing birthplaces and burned records can stall an Irish search. That’s a good point to consider hiring a professional genealogist — Ireland has accredited researchers who know the local archives.
Frequently asked questions
Can I use a printout from IrishGenealogy.ie for the Foreign Births Register?
Use it to find the record, then order an official certificate. Applications need original civil documents, not photocopies or website printouts.
My grandparent was born before 1864. What then?
Civil registration of births in Ireland began in 1864, so for an earlier birth the usual evidence is a church baptism record. The Ireland guide and the Foreign Births Register guidance explain what to submit.
Does a grandparent born in Northern Ireland count?
Yes. For Irish citizenship by descent, a birth anywhere on the island of Ireland counts the same — so look in GRONI’s records as well as the Republic’s.