Ancestry/Genealogy

A lot of the info available via sites like Rootsweb's Worldconnect database and the LDS Familysearch database needs to be taken with a pretty large grain of salt; from what I've seen there's a tendency for people to make questionable assumptions based on little to no evidence. I wouldn't accept anything as credible without finding supporting documentary evidence. For instance, searching for Abraham Pietersen van Deusen, I find that while he was himself a relatively prominent individual (being one of the governing council of New Amsterdam, and being an ancestor of Martin van Buren and Franklin Roosevelt), he doesn't have ancestry traceable back more than three generations, nor does he have any royal ancestry. See Gary Boyd Roberts' "Royal Descents of 600 Immigrants to the American Colonies who were themselves notable or left notable descendants" (unwieldy title, but it's generally considered to be the best source for documented colonial immigrants whose ancestry traces back to royalty; Abraham van Deusen's name is absent, which, considering that he appears in the same author's "Ancestors of American Presidents", is more likely to be because Abraham van Deusen has no such ancestry than from oversight).