Isabella of Castile, Duchess of York

Isabella of Castile
Duchess of York
Isabella depicted in a 15th century family tree of Edward IV
Born	1355
Died	23 December 1392 (aged 36–37)
Burial	13 January 1393 King's Langley Priory (1393–1575) All Saints' Church, Kings Langley (since 1575)
Spouse	Edmund, 1st Duke of York
Issue	Edward, 2nd Duke of York Constance of York Richard, 3rd Earl of Cambridge
House	Castilian House of Ivrea
Father	Peter of Castile
Mother	María de Padilla

Isabella of Castile, Duchess of York (1355 – 23 December 1392) was the daughter of King Peter and his mistress María de Padilla (d. 1361). She accompanied her elder sister, Constance, to England after Constance's marriage to John of Gaunt, 1st Duke of Lancaster, and married Gaunt's younger brother, Edmund of Langley, 1st Duke of York.