Mabel FitzHamon
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Mabel FitzHamon was the daughter and heiress of Robert FitzHamon, the Norman conqueror of Glamorgan, and Henry the First married her to his own natural son Robert, making him Earl of Gloucester in her right. It was her inheritance that gave him the power to sustain the Empress Matilda's cause for a decade.
Research notes
✓ DOCUMENTED (Entered 23 Jul 2026 under the relaxed rule (standard, undisputed peerage/royal account; provenance so noted).): MABEL, dau. and heiress of ROBERT FITZHAMON, lord of Gloucester and conqueror of GLAMORGAN (note-only); the proud bride who (per the chroniclers' tale) refused a husband with no surname until the King endowed Robert with one; Countess of Gloucester; mother of the 2nd Earl (our line). Direct ancestress. Added 23 Jul 2026.