I too have had no luck tracing my grandfather (known as John) Patrick John Fay's family. He was b.March 1924 in Loughgall, son of Annie Mcgowan and .... Fay. However that is all I know as he came to England in 1947/8 and had no contact with his family since. My dad seems to think he was one of 9, one of whom may have been called Denise who emigrated to canada. The surname does not appear to be that common in the area, but there have been changes to the spelling and can be found as Fahey, Faye. Good luck, I hope you find a link somewhere!