Gerulf Count of FRIESLAND 
He had a biological son named Dirk I (Dietrich).
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Personal Details
Gerulf Count of FRIESLAND
Gerulf Count of was born about 0845 in Netherlands. Gerulf Count of is no longer alive.
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Children
Dirk I (Dietrich) HOLLAND
Dirk I (Dietrich) was born about 0900 in Nordwijk-Binnen, Netherlands. He died in Egmond-Binnen, Netherlands.