Godfrey The Bearded of Louvaine Barbutus, Duke of Louvaine And Brabant
Stammtafeln shows that Ida was Adeliza's mother and other works agree.
Brenan in his History of the House of Percy suggests that Clemantine was her
mother and Ida was Jocleyn's mother. Stammtafeln does not list Jocelyn at all!
The Complete Peerage, V.x,p445,note.l, says that Jocelyn's mother is unproven