From http://fmg.ac/Projects/MedLands/ENGLISH%20NOBILITY%20MEDIEVAL1.htm#RenaudDunstanvilledied1175

BEATRICE FitzWilliam, daughter & heiress of WILLIAM FitzRichard FitzTurold Lord of Cardinham, Cornwall & his wife ---. The Gesta Stephani Regis records that "Willelmus filius Ricardi…[in] comitatus Cornubiensis" rebelled against King Stephen and married "filiam suam" to "Reinaldo filio regis Henrici", dated to [1140/42][128]. The primary source which confirms her name has not yet been identified. She is called Mabilia in Domesday Descendants[129

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -------------------- Beatrice FitzRichard was related to Beatrice de Valle; said by Dugdale to have been the mistress of Rainald, Earl of Cornwall, and may have been the same lady as Earl Rainald's wife, Beatrice, daughter and heir of William Fitz-Richard.2 Beatrice FitzRichard was born circa 1113?. She was the daughter of William FitzRichard.1 Beatrice FitzRichard married Rainald fitz Roy, 1st Earl of Cornwall, son of Henri I "Beauclerc", roi d' Angleterre and Sibyl Corbet.1 -------------------- http://www.mathematical.com/vauxbeatrice1149.html