Constance, daughter of Richard de Beaumont, Vicomte of Beaumont. [Burke's Peerage]
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He married Constance, daughter of Richard DE BEAUMONT, SEIGNEUR OF BEAUMONT-LE-VICOMTE, FRESNAY AND STE-SUZANNE, hereditary vicomte of Maine (usually styled VICOMTE DE BEAUMONT). Constance, whose sister Ermengard married William the Lion, King of Scotland, brought her husband in free marriage the manor of Ailrichescot (South Tawton) in Devon, which Henry I had given in free marriage with her grandmother, his illegitimate daughter Constance, to Roscelin de Beaumont, styled Vicomte de Beaumont. She seems to have possessed considerable influence and to have enjoyed favour with John; but the King of France confiscated her Norman lands. Roger was living, 29 December 1208, but died shortly afterwards, probably in January 1208/9. His widow had Stratfield restored to her after his death. She was living in 1226 across the seas. [Complete Peerage XII/1:765-9, (transcribed by Dave Utzinger)]