William de [Earl of Derby] FERRIERES
SOURCES: 1. Derby Pub. A Vol 9 p. 118 2. Plantagenet Ancestry, p. 78 3. Burke's Dormant & Extinct Peerage, 1883 ed.
He married Sybil de Braose Abt 1173/74 at of Sussex, England . Sybil de Braose was born at of Bramber, Sussex, England Abt 1148 daughter of William de Braose and Bertha de Gloucester .
They were the parents of 3
children:
William de Ferrers
born Abt 1162.
Millicent de Ferrers
born Abt 1164.
Agatha de Ferrers
born Abt 1168.
William de [Earl of Derby] Ferrieres died 1190 at Battle of Acre .
Sybil de Braose died Aft 5 Feb 1227 at England .