3rd Earl of Leicester Robert de Beaumont
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- 1 3rd Earl of Leicester Robert de Beaumont [1]
- Pernel de Grandmesnil
- 2 Margaret de Beaumont [1.1]
- 1st Earl of Winchester Saher de Quincy, of Grantchester b. Abt 1175 d. 3 Nov 1219
- 3 Robert de Quincy [1.1.1] b. Bef 1187
- Countess of Lincoln Hawise of Chester b. 1180 d. Abt [J] Feb 1243
- 4 Margaret de Quincy [1.1.1.1] b. Between 1196 and 1205 d. Abt Mar 1266
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- 4 Margaret de Quincy [1.1.1.1]
- 3 2nd Earl of Winchester Sir Roger de Quincy [1.1.2] d. 25 Apr 1264
- Ellen of Galloway
- 4 Margaret de Quincy [1.1.2.1] b. Between 1179 and 1223 d. Abt [J] Mar 1281
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- 4 Margaret de Quincy [1.1.2.1]
- 3 Hawise de Quincy [1.1.3] b. Abt 1215 d. Aft 1273
- 4th Earl of Oxford Sir Hugh de Vere b. Abt 1210 d. Bef 23 Dec 1263
- 4 Isabel de Vere [1.1.3.1] b. Abt 1250 d. Bef [J] 7 Jan 1291
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- 4 Isabel de Vere [1.1.3.1]
- 3 Robert de Quincy [1.1.1]
- 2 Margaret de Beaumont [1.1]