Herbert IV of Vermandois (1028–1080), Count of Vermandois, was the son of Otto of Vermandois and Parvie (Pavia or Patia).
[1] Herbert married Adele of Valois, daughter of Ralph IV of Valois[2] and Adele of Bar-sur-Aube.
They had: Adelaide's husband, Hugh, inherited the countships of Vermandois and Valois upon Herbert's death.
[a][5]