University of Hull Royal Database (England), Author Address: @ Some sources dont show William as the son of Richard at all.
The cited information was published by University of Hull, Hull, UK HU6 7RX, 1994, 1995, 1996 (Ref: Some sources dont show William as the son of Richard at all.) The author/originator was Brian Tompsett, Dept of Computer Science.
Source Notes
Usually reliable but sometimes includes hypothetical lines,
mythological figures, etc.