So many people have Irish Ancestors and half of them are looking for their family records. Well maybe not half at the moment ,they will soon be starting their search.
My Ancestors came from Northern Ireland ,County Down so many of the sites that i recommend are for that area.
This site is a must for County Down, it is completely free. Try the Surname search, look carefully as its very possible that your Ancestor is mentioned here.Lots more informmation on this site too, places, Churches.