William I and Beatrix were married in a religious ceremony about 1165.1 They had a daughter named Margaret.
Family Notes
[MARSHALL.FTW]
SOURCE NOTES: date: about 1165 [Ref: Weis AR #133] abt 1165 [Ref: Moriarty p107, Moriarty p108] second marriage of Guillaume [Ref: ES XI #158], names: William I Count Of Geneva & Beatrix De VALPERGS [Ref: Watney #438]