I am looking for Shannons from Bucks County PA. Samuel Shannon thought to be born January 29, 1718 in Cavan county Ireland. He had possibly 4 sons who were born in Bucks county. James was born about 1764 and brothers thought to be named John, Jeremiah and Samuel. Samuel was reputed to be a surgeon in the revolutionary war and one brother thought killed at the Battle of Brandywine. The family tree for James is mostly known. I am looking for information for the other three brothers and the father. Any help would be appreciated.