If you are a Sweaney Family member that is also related to the Pierces (Elmer Sweaney + Zenobia Pierce) or a Pierce Family descendant from Wood County, Texas or Tennessee, you are also Descended from some of the Percys that were Dukes of Northumberland during Medieval times. Henry De Percy, Duke of Northumberland married Mary Plantagenet, granddaughter of King Edward I, who in turn was the son of Henry III of England. Please contact me or visit my site: SweaneyTree.com for more information and a full descendant tree and links.