Be very suspicious of royal bloodlines. During the late middle ages they were often made up to justify the ruler's claim to the throne. Be especially leary of bloodlines that lead to Charlemagne. Everyone who wanted to claim royalty latched onto him as the firat Holy Roman Emperor. I myself have seen "family trees" linking me as a direct descendant of Kenneth McAlpine. These may or may not be true. In fact, Duke of Argylle during late the middle ages had a family tree tracing his lineage back to Adam and Eve. They are fun, but do not put too much stock in a tree unless you have done the research yourself and have copies of the documents, birth, baptismal, death certificates, etc.