Otto, Count of Vermandois
Otto of Vermandois, Count of Vermandois, was the son of Herbert III, Count of Vermandois and Ermengarde of Bar-sur-Seine. He succeeded his brother, Adalbert II as count of Vermandois in 1015. Otto donated property to Notre-Dame de Homblières by charter.He married Pavia . Their children were:
- Herbert IV, Count of Vermandois.
- Simon, Seigneur de Ham.
- Peter of Vermandois