Thos Donahoe 1818-1896/ Mary Caveney 1823-1892 are my gg-grandparents (Elizabeth Cain 1775-1866; my ggg-grandmother). Matriarch-Elizabeth and four sons; James, Daniel, John and Thomas, and daughter Mary (Kelly) begin appearing in 'Lower-Canada' records circa 1832-3. From the 1852 census onwards, the record is fairly well documented (listed in 1881 census as 'Dunahoe'). Prior to ~1833, I have no knowledge re: ship lists or residency in Ireland. James Sr? (husband to Liz Cain); I have no definite record of this ancestor. Her son, James, is frequently confused as the 'husband'.
I guess your Peter 1859-? and Tom Jr 1855-1923(Idaho)would be my gg-uncles... Their youngest brother, Joseph 1861-1903, buried Frenchtown, Montana, is my great-grandfather. My late father and I located the cemetery and marble marker in 1987. We were planning a subsequent motor trip to Huntingdon, Quebec to scout out church records/cemeteries but never followed through. My father just missed the computer internet age, and I can only imagine how thrilled he would have been to partake in online genealogy.