Research Notes:

[Infanta] doña Isabel de Castilla y León. Ayala´s Crónica de Pedro I records the birth “en Oterdesillas” in 1355 of “una fija de Doña Maria de Padilla...Doña Isabel, que casó despues con Mosen Aymon fijo del Rey Eduarte de Inglaterra...despues Duque de Yort”. Ayala´s Crónica de Pedro I records that, after the death of their brother Alfonso, the right of the king´s three daughters “para heredar los Regnos de Castilla é de Leon, cada una en sucesion de la otra” was recognised in early 1363. A late 15th century/early 16th century manuscript records that “Edmundo Langley duci Ebor fratri...Johannis ducis Lancastrie” married “Henricus rex Hispaniarum...tertia filia” ¹

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Isabel lies entombed with her husband in King's Langley. By the terms of her will, dated December 6, 1392, she asked that a hundred trentals and a hundred sauters were to be said for her soul, and four priests, or one at least, were to sing for her by the space of four years. Upon the day of her burial her best horse was to be delivered for her mortuary. She bequeathed to the King her heart of pearls; to the Duke of Lancaster, a tablet of jasper, given her by the King of Armenia; to her son Edward, her crown, to remain to his heirs; to Constance le Despencer, her daughter, a fret of pearls; to the Duchess of Gloucester, her tablet of gold with images, and also her sauter with the arms of Northampton; and to the King the residue of her goods, in trust that he should allow his godson Richard, her younger son, an annuity of 500 marks for life, a trust which the King, out of the great respect he bore to her, accepted. ²

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The Will of Isabel Duchess of York, written 6 Oct [6 Ric. II], proved 6 Jan 1392

Isabel Duchess of York, Countess of Cambridge. My body to be buried wheresoever my Lord and husband, and the King shall appoint, and I desire that upon that day of my death an hundred trentals and one hundred sauters be said for my soul; likewise that four priests, or one at the least, shall sing for me for four years, and that on my burial day my best horse be given for my mortuary; to the King my heart of pearls; to the Duke of Lancaster a tablet of jasper, which the King of Armonie gave me; to Edward earl of Rutland, my son, my crown, to remain to his heirs; to Constance le Despencer, my daughter, a fret of pearls; to the Duchess of Gloucester, my tablet of gold, with images, also my sauter with the arms of Northampton; to the King, after the payment of my legacies, the remainder of my goods in trust, that he allow to Richard, my son, his god-son, five hundred marks annually for his life. And I appoint Monsr. Lewis Clifford and Monsr. Richard Stury my executors. ³