Research Notes:

Regino names (in order) "Bernardum, Pippinum et Heribertum" as the three children of "Pippinum", specifying that Héribert killed "Rodulfum comitem filium Balduini comitis". "Heribertus, Bernhardi frater" is named in the Vita Hludowicis Imperatoris. He was at the court of Emperor Charles II “le Chauve” in 877.

Comte de Soissons 886/898. Abbé de St Crépin. Comte de Meaux et de Madrie 888/889. He became Comte de Vermandois in 896. The Annales Vedastini record that "Rodulfus comes" disrupted the peace in 896 and took the property of "Heribertus et Erkingerus", that "Odo rex" besieged "castrum sancti Quintini et Peronam" and expelled Raoul's supporters, and that Héribert killed Raoul. Comte Héribert opposed Eudes King of France, but was reconciled with the king in 897, an event which may have been confirmed by the marriage of Héribert's daughter to the king's nephew Robert.

Baudouin II Count of Flanders attacked Vermandois, was driven out by 900 but reconquered it and killed Héribert [I] Comte de Vermandois in revenge for his brother's death. ²