
Avice Lancaster

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- 1 Avice Lancaster [1] b. Abt 1088 d. Abt 1149
William Peverel b. Abt 1085 d. Aft 1155
- 2 Margaret De Peverel, Countess of Derby [1.1]
b. 1114 d. 1154
Robert Ferrers b. Abt 1118 d. Bef 1160
- 3 William Ferrers [1.1.1]
b. 1140 d. 21 Oct 1191
Sybil Braose b. Abt 1149 d. Aft 5 Feb 1228
- 4 Petronell Ferrers [1.1.1.1]
b. Abt 1190 d. Aft 12 May 1237 [ =>]
- 4 Petronell Ferrers [1.1.1.1]
- 3 William Ferrers [1.1.1]
- 2 Margaret De Peverel, Countess of Derby [1.1]