ID
Isabel de Ferrers
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About
Isabel de Ferrers, of the Ferrers earls of Derby, was wife of Roger de Mortimer of Wigmore and mother of Ralph, in the marcher line.
Research notes
✓ ISABEL DE FERRERS, wife of Roger de Mortimer; mother of Ralph (our line). The FERRERS of Derby ascent above, note-only. Source: standard Mortimer-of-Wigmore genealogy (CP/Mortimer History Society), web-confirmed 6 Aug 2026; contested rungs note-only, not hardened.