Descendancy for Isabel de Brus: Mallory Genealogy

Abt 1245 - Bef 1285 (~ 40 years)

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1 Isabel de Brus ^[1] b. Abt 1245 d. Bef 08 May 1285
- Sir John FitzMarmaduke b. Abt 1240 d. Bef 16 Aug 1311
  - 2 Mary FitzMarmaduke ^[1.1] b. 1273
    - Sir Robert Lumley b. Abt 1272 d. Bef 13 Jul 1308
      - 3 Eleanor Lumley ^[1.1.1] b. Abt 1297 d. 31 Mar 1368
        
        8th Earl of Angus Sir Robert de Umfreville b. Abt 1277 d. 02 Apr 1325
        
        4 Sir Thomas de Umfreville ^[1.1.1.1] b. Abt 1329 d. 21 May 1387 [ =>]
        
        4 Robert de Umfreville ^[1.1.1.2]