Eleanore of Aragon (20 January 1358 - 13 August 1382) was the daughter of Pedro IV, King of Aragon (1319-1397) and his wife Eleanore of Sicily (~1325-1374). Her brother became Juan I, King of Aragon. She was born at Santa Maria del Puig and died at Cuellar . On 18 June 1375, at Soria, she married Juan I, King of Castile (1358-1390). They had amongst other children, the twins:

1. Enrique III (1379-~1406)
2. Ferdinand I (1379-1416)