William (Walkelin) DE FERRERS, Earl of Derby
ca. 1140 - 1191 (51 år)(
= Efterkommere til dette punkt, 
= Udvid, 
= Fold sammen)
- 1 William (Walkelin) DE FERRERS, Earl of Derby [1] f. ca. 1140 d. 1191
- Sibyl DE BRAOSE
- 2 William DE FERRERS, Earl of Derby [1.1] f. 1162 d. 22 sep. 1247
- Agnes DE MESCHINES
- 3 William DE FERRERS, Earl of Derby [1.1.1] f. 1193 d. 24 mar. 1254
- + Sibyl MARSHAL
- Margaret DE QUINCY
- 4 Robert DE FERRERS, Earl of Derby [1.1.1.1] f. 1239 d. 1278/79
[ =>]
- 4 Robert DE FERRERS, Earl of Derby [1.1.1.1]
- + Sibyl MARSHAL
- 3 William DE FERRERS, Earl of Derby [1.1.1]
- 2 William DE FERRERS, Earl of Derby [1.1]