Juan el de Tarifa, señor de Valencia de Campos

Infante don JUAN de Castilla y León, son of don ALFONSO X "el Sabio" King of Castile & his wife Infanta doña Violante de Aragón (Seville [15 May/25 Jul] 1260-Vega de Granada 25 Jun 1319, bur Burgos). Twin with his brother Pedro. Señor de Valencia de Campos, Oropesa, Baena, Ponferrada, Villafranca de Valcarcel, Bembibre, Castroverde, Valderas, Dueñas y Luque. Alférez mayor of his father Alfonso X King of Castile 7 Jul 1277 to 10 Jan 1284. He at first sided with his brother Sancho in revolt against their father, but reconciled himself with the latter who, by will, named Infante don Juan ruler in Seville and Badajoz, although this was never implemented. Mayordomo mayor of his brother King Sancho IV 20 Aug 1284 to 7 Jan 1285. He rebelled against his brother, joining Abu Yakub King of Morocco to retake Tarifa for the Moors. The Chronicon Domini Joannis Emmanuelis records that “Rex Dns Sancius” captured “Infantem Dnm Joannem germanium proprium” in May 1287[756]. He claimed the crown of Castile, alleging that King Sancho IV's children were illegitimate as the king was related to his wife in the third degree. Imprisoned until 1292. The Chronicon Domini Joannis Emmanuelis records that “Infans Dns Joannes” declared himself “Regem Legionis” in Jul 1297[757]. The Chronicon Domini Joannis Emmanuelis records that “Infans Dns Joannes” made peace with “Regi Dno Fernando” in Jul 1300 and ceased calling himself king[758]. Alférez mayor of his great nephew Alfonso XI "el Justo" King of Castile 20 Apr 1312 to 2 Aug 1318. The Chronicon Domini Joannis Emmanuelis records the death in Jun 1319 of “Infantes Dns Joannes et Dns Petrus, in Vega Granatæ”[759]. He died of apoplexy while preparing another campaign against the Moors.

m firstly (Burgos 1281) MARGHERITA di Monferrato, daughter of GUGLIELMO VII Marchese di Monferrato & his wife Isabel de Clare (-1286).

m secondly (before 11 May 1287) doña MARÍA Díaz de Haro Señora Soberana de Vizcaya, daughter and heiress of don LOPE Díaz IV de Haro Señor Soberano de Vizcaya & his wife doña Juana Alfonso de Molina ([1274]-monastery of Perales 3 Nov 1342). The mid-14th Century Nobiliario of don Pedro de Portugal Conde de Barcelós names “don Diego…è una hija…doña Maria” as the children of “el conde don Lope” and his wife, adding that María married “el infante don Juan”[760]. Her inheritance was disputed by her uncle don Diego V de Haro, whom her husband defeated.

Infante Juan & his first wife had one child:

1. don ALFONSO de Castilla ([1282/83]-Morales Aug 1316). Señor de Valencia de Campos y Mansilla, during the lifetime of his father, whom he predeceased.

- see below.

Infante Juan & his second wife had three children:

2. don LOPE Díaz de Haro ([1288]-after 1295).

3. doña MARÍA Díaz de Haro ([1292]-Torrelobatón before 1299). m (1295) as his second wife, don JUAN Núñez de Lara, Señor de Lara y Albarracín, son of don JUAN Núñez de Lara & his second wife doña Teresa Díaz de Haro ([1282]-Burgos after 16 Sep 1315).

4. don JUAN de Castilla "el Tuerto" (after 1293[761]-murdered Toro 2 Dec 1326). The mid-14th Century Nobiliario of don Pedro de Portugal Conde de Barcelós names “don Juan” who was blind in one eye as son of “el infante don Juan” and his wife María[762]. He succeeded as Señor Soberano de Vizcaya, by right of his mother. He disputed power with the Infantes don Felipe and don Juan Manuel, on the accession of King Alfonso XI. The Chronicon Domini Joannis Emmanuelis records that “Dns Joannes filius Infantis Dni Emmanuelis et Dns Joannes filius Infantis Dni Joannis” renounced their tutorship over King Alfonso XI in Aug 1325[763]. Supported by the powerful Haro family, he acquired a position of such power in Castile that the king eventually imprisoned him and ordered his death. The Chronicon Domini Joannis Emmanuelis records that the king ordered the death of “Dnm Joannem, filium Infantis Dni Joannis” in 1326[764]. m dona ISABEL de Portugal Senhora de Pinella e Miranda, daughter of Infante dom AFONSO de Portugal Señor de Portoalegre & his wife doña Violante Manuel [de Castilla-Peñafiel] ([1292]-shortly before 1367). The mid-14th Century Nobiliario of don Pedro de Portugal Conde de Barcelós records that “don Juan el Tuerto” married “doña Isabel, hija del infante don Alonso de Portugal é de doña Violante, hija del infante don Manuel de Castilla é de la infanta doña Constanza de Aragon”[765].