Nielsen Hayden genealogy
Descendants of Arnulf I
- 971Father: Adalulf ( - 933)
Arnulf I ( - 971)
   └─ Arnulf II ( - Abt 990)
    (Unknown daughter of the castellan of Lens)
       └─ Baldwin ( - 1024)
        Adelvie de Gant
            + Mathilde of Louvain (Abt 993 - ??)