Adelaide de Vermandois
1062 – 1120
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Adelaide (c.1062-1120), Countess of Vermandois in her own right, was the last of the landed Carolingians: with her the male-line inheritance of Charlemagne's blood in Vermandois came down to a single heiress. She married Hugh the Great, brother of King Philip I of France, and their daughter Isabel de Vermandois carried this double royalty; Carolingian and Capetian; into the English baronage, where she became one of our most-travelled ancestresses.
Research notes
✓ DOCUMENTED (web-confirmed 23 Jul 2026 (Wikipedia/Complete Peerage/standard gateway pedigree)): ADELAIDE, COUNTESS OF VERMANDOIS (c.1062-1120), dau. and heiress of Herbert IV, Count of Vermandois, by Adele of Valois - THE LAST LANDED CAROLINGIAN, through whom the CHARLEMAGNE descent passes; m. Hugh Magnus. Mother of Isabel de Vermandois (our line). Direct ancestress. Added 23 Jul 2026.