Nielsen Hayden genealogy
William Avenal
Abt 1202 - Bef 1236 (~ 33 years)(
= Descendancy chart to this point, 
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- 1 William Avenal [1] b. Abt Nov 1202 d. Bef 21 Apr 1236
- Aline
- 2 Cecily Avenal [1.1] d. Bef 10 Aug 1301
- John de Muscegros b. 10 Aug 1232 d. Bef 8 May 1275
- 3 Robert de Muscegros [1.1.1] b. 1252 d. 27 Dec 1280
- (Unknown first wife of Robert de Muscegros)
- 4 Hawise de Muscegros [1.1.1.1] b. 21 Dec 1276 d. Between 23 Jun 1340 and 22 Dec 1350
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- 4 Hawise de Muscegros [1.1.1.1]
- 3 Robert de Muscegros [1.1.1]
- 2 Cecily Avenal [1.1]