WD
William de Say sr
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An earlier William de Say married Beatrice de Mandeville, sister of the first Earl of Essex, and through that marriage the Mandeville earldom came at last to the Says' descendants.
Research notes
WILLIAM DE SAY sr (d. c.1144); m. BEATRICE DE MANDEVILLE, sister of Geoffrey de Mandeville 1st Earl of Essex; father of William de Say (d.1177, our line - I100134). Sources: Round, Geoffrey de Mandeville; CP 'Essex', as cited in the survey. ||RESEARCH-FLAG|| OPEN - the Says run higher (Picot de Say etc.) in standard sources; not chased this pass. Added 14 Sep 2026.