Hi Valerie
There is lots of useful information to be found in the 1901 and 1911 census records. You can find this here: http://www.census.nationalarchives.ie/search/ which may help you to make a conection. Also https://familysearch.org/ may help you to trace the families you are looking for.
The database for genealogical records in Dublin may be of some assistance to you http://dublinnorth.rootsireland.ie/. Information from this source is available for a fee.
I wish you luck in your search.
Please make sure you link anyone else in your family who is interested in their Irish heritage to our site - and indeed anyone else you know of Irish heritage.
Kind regards,
Cynthia O'Connor
Genealogy Support
Ireland Reaching Out