RF
Robert fitz Swein of Essex
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Robert fitz Swein of Essex (d. c.1140), lord of Rayleigh, who built or held Rayleigh Castle; father of Henry of Essex.
Research notes
✓ DOCUMENTED (Wikipedia 'Henry of Essex'; standard Rayleigh honour pedigree, web-confirmed 7 Aug 2026). Added 7 Aug 2026 (cheap-win audit): a documented rung previously left as a floor. Direct-ancestor line only; collateral kin not wired.