Hello, Curt. My apologies for the delayed response. The Raoul in question who was with King William was Raoul III de Tosny, Seigneur de Conches, Lord of Flamstead. His ancestry is clearly indicated. The other link you refer to is a placeholder for the father of a group of children whose parentage is uncertain, who may be the children of Raoul II (but it is not certain).
The numbering of names varies between historians, and there were at least 6 Raoul or Ralph de Tosny/Toeni/Tonys. So it understandably gets confusing.