Beatrix of Montdidier
Generation: 1
Generation: 2
Generation: 3
Generation: 4
1. Beatrix of Montdidier Beatrix — Geoffrey de Perche, Comte de Perche et Mortagne II. Geoffrey died Abt Oct 1100. [Group Sheet]
Children:
Generation: 2
2. Margaret de Perche 
(1.Beatrix1)Margaret married Henry de Beaumont, 1st Earl of Warwick Bef 1100. Henry (son of Roger de Beaumont and Adeline de Meulan) died 20 Jun 1119. [Group Sheet]
Children:
- 3. Roger de Beaumont, 2nd Earl of Warwick was born 1102; died 12 Jun 1153.
- 3. Roger de Beaumont, 2nd Earl of Warwick
Generation: 3
3. Roger de Beaumont, 2nd Earl of Warwick (2.Margaret2, 1.Beatrix1) was born 1102; died 12 Jun 1153. Roger married Gundred de Warenne 1130. Gundred (daughter of William de Warenne, 2nd Earl of Surrey II and Elizabeth of Vermandois, Countess of Leicester) was born Abt 1120; died 1166. [Group Sheet]
Children:
- 4. Waleran de Newburgh, 4th Earl of Warwick died 1205.
- 5. Gundred de Newburgh was born Abt 1135; died Between 1200 and 1208.
- 6. William de Newburgh, 3rd Earl of Warwick died 15 Nov 1184.
- 4. Waleran de Newburgh, 4th Earl of Warwick
Generation: 4
4. Waleran de Newburgh, 4th Earl of Warwick (3.Roger3, 2.Margaret2, 1.Beatrix1) died 1205. 5. Gundred de Newburgh (3.Roger3, 2.Margaret2, 1.Beatrix1) was born Abt 1135; died Between 1200 and 1208. Gundred — Hugh Bigod, 1st Earl of Norfolk. Hugh (son of Roger le Bigod and Alice de Tosny) was born Abt 1095, Leicestershire, England; died Bef 09 Mar 1176/77, Palestine. [Group Sheet]
Children:
- 7. William de Bigod
- 8. Hugh Bigod
- 7. William de Bigod
6. William de Newburgh, 3rd Earl of Warwick (3.Roger3, 2.Margaret2, 1.Beatrix1) died 15 Nov 1184.