To answer your questions:
- The only source listed appears to be someone's personal family tree; whether that tree, wherever it resides, has sources I don't know, as it doesn't come with a link.
- William doesn't have any sources except the personal family tree.
- Yes, I can provide two published sources, one public domain, one copyrighted.
- Profile manager is active; the profiles for William and his father were just created yesterday.
I will PM the profile manager and see what happens.