I've recently discovered that I am related to Clifford de Clifford and (more specifically) to Maude (Beauchamp) de Clifford. She is my 18th great grandmother. Maude was the daughter of Thomas de Beauchamp, K.G. and 11thEarl of Warwick.
Thomas de Beauchamp was descended from Geoffrey Plantagenet by Katherine daughter of Roger Mortimer - descendant of King John.
I'm trying to join the House of Plantagenet but don't know how to do genealogy. George Washington is my 12th cousin - 7 Xs removed while cousin George is my grandmother's (late) 9th cousin - 7 Xs removed.