She was daughter and heir of William de Blancminster. Her inheritance was the part of Album Monasterium held from Earl de Warenne and was known as Whitechurch [Revised by others later George Edward Cokayne The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, Extant, Extinct, or Dormant, I-XIII (in 6) (Thrupp, Stroud, Gloucestershire, GL5 2BU: Sutton Publishing Limited, 2000), XII/1:341].