Herfast de Crepon 
Herfast was born about 0955. Herfast's father was Herbastus de Crepon and his mother was Gunhilde Olafsdatter. His paternal grandfather was Herfast UNKNOWN; his maternal grandparents were King Olaf 'Mitkg' Bjornsson and Ingeberg Thrandsdatter. He was an only child.
He had a biological son named Osbern.
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