Descendancy for Piers FitzHerbert: Mallory Genealogy

Piers FitzHerbert

Abt 1163 - Bef 1235 (~ 72 years)

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1 Piers FitzHerbert ^[1] b. Abt 1163 d. Bef 06 Jun 1235
- Alice Warkworth
  - 2 Lucy Fitzpiers ^[1.1] b. 1204 d. Aft 1266
    - Sir William de Ros b. Bef 1200 d. Abt 1265
      - 3 Sir William de Roos of Ingmanthorpe Sir William de Ros ^[1.1.1] b. Abt 1244 d. Bef 28 May 1310
        
        Eustache FitzRalph b. Abt 1240 d. Bef 1309
        
        4 Lucy de Ros ^[1.1.1.1] b. Abt 1272 [ =>]
        
        4 Ivette de Ros ^[1.1.1.2] b. Abt 1285 [ =>]
      - 3 1st Baron de Ros Robert de Ros ^[1.1.2] d. 1285