Princess Isabel Perez
- Born: 1355, Tordesillas, Valladolid, Castilla-Leon, Spain
- Marriage: Edmund, Prince of England, Duke of York Plantagenet
- Died: 1392, Kings Langley, Hertfordshire, England at age 37
Princess married Edmund, Prince of England, Duke of York Plantagenet, son of Edward III, King of England Plantagenet and Phillipa de Avesnes. (Edmund, Prince of England, Duke of York Plantagenet was born in 1341 in Kings Langley, Hertfordshire, England and died in 1402 in Langley, Hertfordshire, England.)
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