William Beauchamp, 1st Baron Bergavenny was born circa 1343 to Thomas de Beauchamp, 11th Earl of Warwick (1313-1369) and Catherine Mortimer (c1314-1369) and died 8 May 1411 of unspecified causes. He married Joan FitzAlan (1375-1435) 23 July 1392 JL . Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s.
|Offspring of William Beauchamp and Joan FitzAlan (1375-1435)|
|Richard Beauchamp, 1st Earl of Worcester (bef1397-c1421)||1397||1421||Isabel le Despenser (1400-1439)|
|Joan de Beauchamp (1396-1430)||1396||3 August 1430||James Butler, 4th Earl of Ormonde (1392-1452)|