John of Castile, called the "el de Tarifa" was an infante of Castile and León. He was engaged in a decades-long fight for control over the Lordship of Biscay with Diego López V de Haro, the uncle of his wife.
- Occupation
- regent
- Position held
- regent, Adelantado mayor de la frontera de Andalucía
- Born
- 1262
- Died
- June 25, 1319, 1319
