Beatrix de Mandevilla, domina de Say, soror Galfridi primi, fundatoris, et amita Willielmi praedicti, totam de jure sibi vendicavit haereditatem, de qua duo nobiles filii procedebant, videlicet, Willielmus de Say, filius suus primogenitus, et Gaufridus frater ejus...
Beatrix de Say, soror fundatoris nostri, et uxor Willielmi de Say, sepulta est in capitulo nostro de Walden, quae obiit anno Domini mcc. Haec enim nobilis matrona lege conjugali Willielmo Say erat copulata, de quo duos suscepit filios, Willielmum et Galfridum.
! (1) d. by 1197--All; very old in 1189 at death of her nephew the 3d Earl of Essex--CPv5p121+fn; md(2) William de Say (1090)-1144 Aug.--All; (ped. in MGH 4sv3p314)
Beatrice (died 19 April 1197 or some year before it), daughter of William de Mandeville, sister of 1st Earl of Essex and divorced wife of Hugh Talebot. [Burke's Peerage]