As your great-grandfather John was born in Dublin after 1864 his birth would be recorded in the General Records Office
(GRO) in Dublin as civil registration was introduced in Ireland, which is when we started seeing the formal registration of births, marriages, adoptions, and deaths.
Information on his marriage to Catherine should also be available at the records office. Have you managed to get any paper records to substantiate this information as a good paper trail is a wonderful asset when tracing family history?
His parents would be born before 1864 when records were kept in the form of church and parish records, and while some of these have regrettably been lost over the years, all the surviving records have been sorted into county-based genealogical centres
. Have you any information on where they were born as this is very important due to the records being available only in parish or church locations?
We have several community posts with helpful resource information
, please take a look and see if there is anything that may be useful to you in your search.
I hope this gives you lots of inspiration, and I'm sure your fellow members and some industry partners will be able to add to this list!
If you need any more help, just let me know!