Sources

1) Source: English Baronies: a Study of Their Origin and Descent, 1086-1327. Reference: Pages 10-12: Bedford (Questionable reliability of evidence)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward I "Isabel, late the wife of Simon de Bello Campo (Beauchamp)...Wottone. The manor (extent given) held in dower, by the assignment of the said Simon with the consent of William de Bello Campo his father, of the heirs of the barony of Bedford.As for the heirs of the said barony, Roger, aged 30 and more, son of Maud de Moubray sister of the said Simon, Joan the wife of Ralph Paynel, aged 30, daughter of Ela sister of the said Simon, Isabel the wife of Simon de Pateshulle, aged 24, daughter of Ida daughter of the same Ela, and Elizabeth the wife of John de Horbur’, aged 34, daughter of the same Ela, are parceners of the inheritance with the heirs of the body of Beatrice sometime sister of the said Simon. This Beatrice was married first to Thomas son of Otto, who had by her a son named Otto, now deceased, and a daughter named Maud now aged 26 years and the wife of John Botetourte: after the death of the said Thomas she was married to Sir William de Montecanyso of Edwardestone who had by her a son named William, who if he survives, as the jury believe, is 12 years of age and more. And because the aforesaid Otto survived his mother Beatrice,"Dated: 1294. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol3/pp183-196. Reference: C 133/73/5 (Data from direct source)