I believe that the names which Turton gave Emma & her father Ralph d'Ivry were wrong, but the pedigree which Turton gave is similar to that of CP, except that Turton has Emma's (Turton says Alberade's) mother as Erneberge de Caux, while CP has her as Albreda. Raoul de Bayeux and Ralph (Raoul) d'Ivry are probably two different names for the same person.