Here are a few references as to your post in "Fellow Curators - Help please or explain!"
It would seem Unknown Profile & Hawise de Redvers are the same but whether she was the wife to both Robert FitzRobert, Castellan of Gloucester & JORDAN De CAMBERNON, I cannot say as these references only list Robert.
The sister Attavis (Avis) de Redvers is connected as wife to Gilbert de Soligny but there is no mention of her on the references, but on http://en.wikipedia.org/wiki/Umberleigh "Gilbert/Phillip de Soleigny married Avis (or Hawis) de Redvers, daughter of "Baldwin de Redvers, Earl of Devon",[6] and according to Risdon the sister of "Richard Rivers, Earl of Devon", probably Richard de Redvers, 4th Earl of Devon (d.1193). For her dowry Hawis was given by her father the manor of Stoke Rivers, which thus passed to her husband.[7] Gilbert/Phillip de Soligny left a daughter Mabill de Soligny as sole heiress, who married Jordan de Champernon, into whose family Umberleigh passed."
http://our-royal-titled-noble-and-commoner-ancestors.com/p890.htm#i...
http://en.wikipedia.org/wiki/Baldwin_de_Redvers,_1st_Earl_of_Devon
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=81927344
http://fabpedigree.com/s049/f790108.htm
https://groups.google.com/forum/#!topic/soc.genealogy.medieval/3CM_...