Even for regular folks you do have some degree of interpretation, especially in situations where digging up a couple of graves to do a DNA test is impossible because you don't have the documents to prove the connection!
Thanks Duc_et_Pair, you have me another rabbit trail to follow. Johan Willem Friso of Nassau is one of the 43,300 names in my family tree maker file (I've seen others that are bigger, 60,000+, 70,000+, 300,000+). I don't have all of his ancestors and other connections yet, but I think I might try adding his people for a while.
There's a local librarian that will get on your case if you don't cite your sources. When doing my Breese genealogy, I try to cite, cite, cite and overcite my stuff!
Proud Percy Descendant ('cause Percy's rule the world!)
Writer on fanficnation.net
Knitting with the Royals
Genealogist: shrinking the world one person at a time.