SD
Sybil de Montgomery
d. 1157
Vitals
Died
1157
Family
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About
Sybil de Montgomery brought the blood of the great house of Montgomery to Gloucester, and her grandson was Robert Earl of Gloucester, the champion of the Empress.
Research notes
✓ SYBIL de MONTGOMERY (d.1157), da. of ROGER DE MONTGOMERY Earl of Shrewsbury (I100159, already in the tree); wife of Robert FitzHamon; mother of Mabel (our line). This rung LOOPS the Gloucester line onto the existing Montgomery earls - Mabel FitzHamon and Matilda de Montgomery (Emma of Mortain's mother) are thus first cousins, both in this tree. Standard well-documented medieval genealogy per the cited authorities (web-confirmed 7 Aug 2026); contested rungs note-only, not hardened.