the people i am looking for pre date the official records. Maybe i'l get lucky with church records but nothing yet. Also the name William Colhoun seems to be pretty common around co. Donegal pre 1800.
Do you know if your William Colhoun is connected to the Colhouns in Inishowen? I have a William Colhoun that married Mary Ann Colhoun who are my great^3 grandparents, and a dead end for me. I have William dying in Inishowen in 1858, probably born about 1790. Neither are rare names, but certainly worth asking.