Thanks for your replies, taramc. I didn't think info. on my ancestor's life over here would help much for searching over there, but here is what I have:
My 4xg.grandfather, Thomas A. Dillon had two middle names; Addis and Emmet/Emmett.
On November 24, 1821, he swore an affidavit, renouncing all allegiance and fidelity to.......particularly to the King of Great Britian and Ireland. November 7, 1821, he signs another document, re: his intent to become a citizen of the United States, was born in Dublin, is 27 years of age and an Irishman; that he migrated from the province of Upper Canada, in March, 1814. Both these documents (copies) are in my files, and both signed as, "Thomas A. Dillon."
He married Lucy Spike- date unknown- had several children and died in 1833, survived by his wife and children. He is listed in the 1830 US census for the town of Phelps, Ontario County, New york and he died there. According to the Phelps town historian, he was an inn keeper.
As I typed his name for an internet search, that's when Thomas Addis Emmet turned up; a member of the United Irishmen. A site I can't seem to locate again, mentioned that they would meet at the White Bull owned by John Dillon. There does seem to be a lot of Addis and Emmet combinations out there. I like your suggestion that perhaps an Emmet- female married a Dillon. Perhaps the John Dillon of the White Bull?
This is getting very interesting....M.K.