MD
Mabel de Belleme
d. 1079
Vitals
Died
2 Dec 1079
Family
About
Mabel of Belleme, heiress of the most feared marcher house in Normandy, was a poisoner by repute who was beheaded in her own castle bed by a knight she had dispossessed; she carried the vast Belleme inheritance to the Montgomerys.
Research notes
✓ MABEL de BELLEME (c.1026-murdered 1079), da. and heiress of William II Talvas of Belleme; wife of Roger de Montgomery; mother of Matilda (our line). Brings in the great marcher house of BELLEME-ALENCON. Standard well-documented medieval genealogy per the cited authorities (web-confirmed 7 Aug 2026); contested rungs note-only, not hardened.