Isabella of Castile, Duchess of York
- Born: Abt 1355
- Marriage: Edmund of Langley, 1st Duke of York in 1372
- Died: 23 Dec 1392, Kings Langley, Hertfordshire, England about age 37
- Buried: Kings Langley, Hertfordshire, England
 Research Notes:
http://wiki.whitneygen.org/wrg/index.php/
Isabella married Edmund of Langley, 1st Duke of York, son of Edward III King of England and Philippa of Hainault, in 1372. (Edmund of Langley, 1st Duke of York was born on 5 Jun 1341 in Kings Langley, Hertfordshire, England and died on 1 Aug 1402 in Kings Langley, Hertfordshire, England.)
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