I don't know if this will be of any use to you. My great great grandfather Thomas Tarpy had a brother named John b. about 1845 in Ireland. He also had a brother named James b. about 1851 in New Jersey. It's possible that this could be the John Tarpy your looking for. I don't know who he married, I didn't do much research into Thomas' brothers. He also had three more brothers, Micheal, Martin and Joseph and a sister Mary. Their parents were Patrick and Bridget. Sorry I don't know what Bridget's maiden name was. Micheal, Martin, and John were born in Ireland, James and Mary were born in New Jersey, Thomas and Joseph were born in Boston. I hope this helps.