Genealogy Forum UK

This Free Site is even better now as expanded available records
and Has Births 1864 to 1918
Marriages 1864 to 1943
Deaths 1878 to 1968
and is bringing more records on line in 2019 going back further than 1864
Covers North and Southern Ireland until partition

https://www.irishgenealogy.ie/en/

It is slightly difficult to navigate and spelling of some Irish names can be varied and various and Irish tend to to use first Christian names on registration and second Christian names or others on Census.
e.g. with girls they tend to have Mary as first Christian name

Their is also a the Irish DNA registry on Facebook that uses a tool called matchbox matchmaker it uses the genesis gedmatch data to match your DNA to any members of the site and you can tag them into your findings so they get a message of the match

Example