Sibyl de Braose
- Born: Abt 1157, Bramber, Sussex, England
- Marriage: William de Ferrières 3rd Earl of Derby 141
- Died: After 5 Feb 1227-1228, England
~Weis' Ancestral Roots . . ., 8th Edition, 194:5-6, Sibyl de Braose, daughter of William de Broase and Bertha of Hereford, married William de Ferrières, 3rd Earl of Derby. 160
~Cokayne's Complete Peerage, 2nd Edition, p. 193 (Derby), Wife of William de Ferrières.
Sibyl married William de Ferrières 3rd Earl of Derby, son of Robert de Ferrières 2nd Earl Derby and Margaret Peverel Coutess Derby.141 (William de Ferrières 3rd Earl of Derby was born about 1130 in England and died before 21 Oct 1190 in Siege of Acre, Palestine 141.)