He married, 1stly, Ela, sister and (eventually, in her issue) coheir of Simon DE BEAUCHAMP, daughter of William DE BEAUCHAMP, BARON OF BEDFORD, by his 2nd wife, Ida, daughter of William LONGESPEE, EARL OF SALISBURY. She died before 10 January 1266/7. [Complete Peerage XII/2:299-301, (transcribed by Dave Utzinger)]
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Ela (died by 10 June 1266/7), daughter of William de Beauchamp, feudal Baron of Bedford, by his 2nd wife Ida, daughter of William Longespee, Earl of Salisbury. [Burke's Peerage]
Note: 1266/7 on death date indicates they might have meant 10 Jan 1266/7. It would then agree with one of the Ancestral Roots lines as well as CP.