Per Medlands' Untitled English Nobility A-C, Cecily and William d'Aubigny, Lord of Belvoir had another child:
iii) MATILDA de Albini Brito . "…Willelmu[us] de Albinioc, Cecilia uxor eius, filii eius Willelmus, Rogerius, Matildis filia eius" are listed in the Liber Vitæ of Thorney abbey, another entry in the same folio reading "Willm de Albenico, Cecilia uxor ei[us], Willm, Rodbt, Roger filii ei[us], Matildis, Basilia filie ei[us]…"[1255].
