Descendancy for William De Mortimer: Our Family History

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1 William De Mortimer ^[1] d. Bef 1180
- - 2 Robert (of Harlaxton) De Mortimer ^[1.1] d. Bef 21 Sep 1217
    - Alice De Munchensy d. Yes, date unknown
      - 3 William (of Attleborough & Harlaxton) Mortimer ^[1.1.1] d. Yes, date unknown
        
        4 Robert De Mortimer ^[1.1.1.1] d. Bef 1265
        
        5 William (of Attleborough) Mortimer ^[1.1.1.1.1] d. 12 Nov 1297
        
        Alice d. Yes, date unknown
        
        6 Constantin (of Attleborough) Mortimer ^{[1.1.1.1.1.1]} d. Bef 9 Aug 1359
        
        Sibyl d. 9 Nov 1334
        
        7 Robert (Sir) (of Attleburgh) Mortimer ^{[1.1.1.1.1.1.1]} d. 25 Sep 1387
        
        Margery d. Yes, date unknown
        
        8 Thomas (Sir) (Yr of Attleburgh) Mortimer ^{[1.1.1.1.1.1.1.1]} d. Bef 1387
        
        Mary Park d. 2 May 1406
        
        9 Cecilia (of Attleburgh) Mortimer ^{[1.1.1.1.1.1.1.1.1]} d. Yes, date unknown
        
        + John (Sir) Harling d. Bef 1 Jul 1403
        
        Sir John 'The Good' (of Attleburgh) Radcliffe b. 1380 d. 1440
        
        10 Sir John (of Attleborough) Radcliffe ^{[1.1.1.1.1.1.1.1.1.1]} d. 28 Mar 1416
        
        Baroness Elizabeth Fitzwalter b. 28 Jul 1430 d. Jun 1483
        
        11 John (9th Baron Fitzwalter) Radcliffe ^{[1.1.1.1.1.1.1.1.1.1.1]} d. 1496
        
        Margaret d. Yes, date unknown
        
        12 Robert Fitzwalter (1st Earl of Essex) Radcliffe ^{[1.1.1.1.1.1.1.1.1.1.1.1]} b. Abt 1483 d. 27 Nov 1542 [ =>]
        
        + Catherine d. Yes, date unknown

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William De Mortimer