| | Herbert V de Vermandois 1015–1076 | | |
| | Eudes I de Vermandois 990–1047 | | |
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| | | | | | Helgaud III de Ponthieu 860–926 | | | | Herlouin I de Ponthieu 830–878 Hélissende de Ramerupt 835–870 | | | | Helgaud II de Ponthieu 805–863 Berthe de Ponthieu 805–859 | | | | Oswin de Boulogne 790–853 | | |
| | | Saint Angilbert de Ponthieu 750–814 Berthe Carolingiens 779–823 | | |
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