Odo I, Count of Vermandois explained

Odo I (Eudes I), called “the Foolish” (fatuus), was the ruler of Saint-Simon. The last Carolingian male (from its branch Herbertines), he was the only son of Herbert IV, Count of Vermandois and Adele of Valois.

Following the marriage of his sister, Adelaide, Countess of Vermandois, to Hugh, Odo was disinherited and Hugh inherited Vermandois.

Sources

• The Provenance of the Descriptio Qauliter Karolus Magnus: Remembering the Carolingians in the entourage of King Philip I (1060–1108) before the First Crusade . Matthew . Gabriele . 93–117 . Viator . 39 . 2 . 2008 . University of California Press .