I'm trying to help a very dear friend find information on her greatgrandfather, John Kernan.He was born in Ireland, where we don't know, abt. 1851. The year he came to America we don't know, but we do know that he married Annie Cannon in Philadelphia, Pa. in 1871, and had a son John Kernan in 1872. Sometime between 1872 and 1880 he must have died, as the 1880 census for Philadelphia, Pa. only lists Annie Kernan and John Kernan age 8. She really doesn't know if he lived in Philadelphia between 1872 and 1880, because the 1880 census shows Annie and John age 8 living with a James Clark family. You state that you have a large History of Kernans, and I'm hopeing that John Kernan above may be in that History.