Guillaume de Bec Hrolfson was born circa 945 to Hrolf Turstain of Heidmark (909-?) and Gerlotte de Blois (c895-937) and died 985 of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Argotus Crespin de Bec (985-c1032) | 985 | 1032 | Louise de Guines (c1010-?) |
Siblings
Footnotes (including sources)
| ‡ General |