Herbert IV of Vermandois (1028–1080), Count of Vermandois, was the son of Otto of Vermandois and Pavia (or Patia).
Family and children
- Adelaide, Countess of Vermandois, married first to Hugh Magnus, son of Henry I of France and younger brother of Philip I of France, and second to Renaud II, Count of Clermont-Beauvaisis. Adelaide had numerous children by both her husbands.
- Odo I, Count of Vermandois
Odo inherited the countships of Vermandois and Valois upon his father's death.
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