Page 16 Thomas Butler, born Dublin 1720, settled in Lancaster County, Pennsylvania, 1748, grandson of Edmond Butler 8th Baron Dunboyne. Son of Catherine and Wm. O'Brien Butler, as her brothers died without descent.
According to the current Lord Dunboyne, John Butler, William O'Brien Butler is not the father of Thomas Butler. His father may in fact be the 8th Baron Dunboyne Edmond Butler.Lord Dunboyne, John Butler says there have been countless marriages and intermixtures between the Butlers and the O'Briens in Ireland over several centuries. Most of the Butlers in America would be descendants of the Dunboyne Branch of the Butlers because there are no known descendants of the Ormonde Butlers living today. This leads me to believe that Thomas Butler the gunsmith of Carlysle PA is probably the son of Edmond Butler the 8th Baron Dunboyne. There is no proof though.