Weis" "Ancestral Roots. . ." (27:30), (70:32), (120:32). The "Dictionary of National Biography" at the end of the article on Roger II Mortimer states , however, that Edmund (Mortimer) married "Margaret ... doubtless the daughter of William de Fiennes, a Picard nobleman, who was second cousin to (Queen) Eleanor through her mother Joan, countess of Ponthieu."