Herbert IV, Count of Vermandois

Herbert married Adele of Valois, daughter of Ralph IV of Valois^[2] and Adele of Bar-sur-Aube. They had:

• Adelaide, Countess of Vermandois, (b. Circa 1062 - d. September 23, 1120) - married first to Hugh Magnus,^[3] son of Henry I of France and younger brother of Philip I of France, and second to Renaud II, Count of Clermont-Beauvaisis.
• Odo I, Count of Vermandois^[4] (b. circa 1064 - d. after 1085)
• Gerard (b. 1066 - d. ?)

Adelaide's husband, Hugh, inherited the countships of Vermandois and Valois upon Herbert's death.^[a][5]

• Crouch, David (1986). The Beaumont Twins:The Roots and Branches of Power in the Twelfth Century. Cambridge University Press.
• Gabriele, Matthew (2008). "The Provenance of the Descriptio Qauliter Karolus Magnus: Remembering the Carolingians in the entourage of King Philip I (1060–1108) before the First Crusade". Viator. 39 (2). University of California Press: 93–117.
• Le Jan, Régine (2003). Famille et pouvoir dans le monde franc (VIIe-Xe siècle). Publications de la Sorbonne.
• Suger (1992). The Deeds of Louis the Fat. Translated by Cusimano, Richard C.; Moorhead, John. Catholic University of America Press.