Beatrice de Beauchamp, daughter of William de Beauchamp of Bedford. [Ancestral Roots]
Beatrice de Beauchamp, 3rd daughter and coheir, d. c 1280/1; m. (1) by 1264, Sir Thomas Fitz Otto (or Fitz Otes) of Mendelsham, Suffolk, b. c 1231 (age 30 in 1261), d. by 28 Mar 1274, holding lands in Hunts, Essex, Beds, Bucks, Gloucs, and Worcs; m. (2) by 26 June 1278, Sir William de Montchensy, of Edwardeston, Suffolk, d. shortly bef. 15 May 1302. [Ancestral Roots, line 122a-31]
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He [William de Munchensy] married, before June 1278, Beatrice, widow of Thomas FITZOTES (hereditary coiner of the Mint, an adherent of the Crown in the civil war, who died 1274, leaving a son Otes, aged 10), and daughter and coheir of William DE BEAUCHAMP, of Bedford. She died before 30 September 1285. [Complete Peerage IX:416-7, (transcribed by Dave Utzinger)]