Thurstan (Toustain) de Montfort-sur-Risle (de Bastembourg), Seigneur de Briquebec - Parentage

Pam has note as to "hurstan's parentage is not certain, but he is traditionally believed to have been the son of Anslec de Briiquebec.

another just this past year has attached a set of parents as

Ansfred Rollosson
Gender: Male
Birth: circa 937
Tillières, Maine-et-Loire, Pays de la Loire, France
Death: circa 978 (33-49)
Tillières, Maine-et-Loire, Pays de la Loire, France
Immediate Family:
Son of Hrolf Turstan and Gerlotte de Blois
Husband of Helloe, Countess Of Beulac