Gerulf (unknown) 
Waltger Dirk I (1st) Dirk I (2nd)
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| Gerulf (unknown) |
| Waltger Dirk I (1st) Dirk I (2nd)
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Gerulf Count of Friesland
abt 0845, Netherlands - ??
(unknown)
?? - ??
Married: ?? - ??
Waltger Count of Nifterlake
abt 0898, Zuid Holland Netherland - ??
Dirk I Count of Holland
abt 0900, Zuid Holland Netherland - ??