Joan de Byron
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- 1 Joan de Byron [1]
- John Longford b. 1260 d. 1304
- 2 Nicholas Longford, I [1.1] b. 1285 d. 1356
- Alice Butler
- 3 Sir Nicholas de Longford, II [1.1.1] b. 1323 d. 1371
- Alice D Eyncourt
- 4 Sir Nicholas Longford, III [1.1.1.1] b. 1350 d. 31 Aug 1403 [ =>]
- Alice D Eyncourt
- 3 Sir Nicholas de Longford, II [1.1.1] b. 1323 d. 1371
- Alice Butler
- 2 Nicholas Longford, I [1.1] b. 1285 d. 1356
- John Longford b. 1260 d. 1304