Weis' "Ancestral Roots. . ." (246D:26), identifies ROGER as her father, but does not identify her mother. The "Norfolk" entry in Cokayne's Complete Peerage" goes into detail on ROGER's children (footnote c on p.578), but makes no mention of Jane. However, the footnote does state "There was possibly another daughter, as Roger FitzRichard of Warkworth (living 1166) is styled 'nepos comitis Hugonis Bigot' by his brother-in-law William de Vere. . ."