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- en.m.wikipedia.org John I of CastileIn September the Spanish fleet returned to Castile, and John I of Portugal gained control of the places formerly occupied by his adversaries.
- familypedia.fandom.com wiki/John_I_of_Castile_(…John I of Castile, King of Castile, King of Toledo, King of León, King of Galicia, was born 24 August 1358 in Epila, Zaragoza, Spain to Henry II of Castile...
- pantheon.world profile/person/John_I_of_Castile/John I of Castile is most famous for being the King of Castile and León, Lord of Biscay, Molina, and Seville.
- factmonster.com encyclopedia/people/history/spain…John I, 1358–90, Spanish king of Castile and León (1379–90), son and successor of Henry II. He tried unsuccessfully to unite the Portuguese and Castilian...
- http://fact-index.com j/jo/john_i_of_castile.htmlJohn I of Castile. John I (August 24 1358-1390), king of Castile, was the son of Henry II and of his wife Joan, daughter of John Manuel of Villena, head of a...
- theeuropeanmiddleages.com portugal/john-i-of-…The Battle of Aljubarrota. John I of Castile. ... To counter the Castilian king, John I of Portugal offered to support John of Gaunt’s claim to the Castilian throne.
- britannica.com biography/John-I-king-of-Castile"John I". Encyclopedia Britannica, 15 Mar. 2024, https://www.britannica.com/biography/John-I-king-of-Castile.
- en.wikisource.org wiki/1911_Encyclopædia_…JOHN I. (1358–1390), king of Castile, was the son of Henry II., and of his wife Joan, daughter of John Manuel of Villena, head of a younger branch of the royal...
- en.numista.com catalogue/ruler.php…John I of Castile. House of Trastámara. King of Castille and Leon. Born on 1 September 1358 in Épila Died on 17 October 1390 in Alcalá de Henares.
- commons.wikimedia.org wiki/Category:John_I_of_…<nowiki>Juan I de Castilla; I. János kasztíliai és leóni király; Joanes I.a Gaztelakoa; Xuan I de Castiella; Joan I de Castella; Johann I.; John I of Castile...