Isabella de Castilla was born 1355 to Pedro I of Castile (1334-1369) and Maria de Padilla (c1334-1361) and died 23 November 1392 England, United Kingdom of unspecified causes. She married Edmund of Langley, 1st Duke of York (1341-1402) 1 March 1372 JL . Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s, Rollo of Normandy (860-932)/s.
|Offspring of Isabella de Castilla and Edmund of Langley, 1st Duke of York (1341-1402)|
|Edward of Norwich, 2nd Duke of York (1373-1415)||1373||25 October 1415||Beatriz of Portugal (1372-1408) Beatriz of Portugal (1372-1408) Philippa de Mohun (-1431)|
|Constance of York (c1374-1416)||1374||28 November 1416 Reading, Berkshire, England||Thomas le Despenser, 1st Earl of Gloucester (1373-1400) Thomas le Despenser, 1st Earl of Gloucester (1373-1400) Edmund Holland, 4th Earl of Kent (1383-1408)|
|Richard of Conisburgh, 1st Earl of Cambridge (c1376-1415)||20 July 1375||5 August 1415||Anne de Mortimer (1390-1411) Anne de Mortimer (1390-1411) Matilda Clifford (-1446)|