Juan Fernández de Velasco, 5th Duke of Frias
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Juan Fernández de Velasco, 5th Duke of Frias, Count of Haro (c. 1550 - March 15, 1613) was a Spanish nobleman and diplomat.
His father was Iñigo Fernandez de Velasco, 4th Duke of Frias and his mother Maria Angela de Aragón y Guzmán.
He first married Maria Tellez-Giron. Their only daughter was Ana de Velasco y Girón who married Teodósio II, Duke of Braganza and who gave birth in 1604 to João, 8th Duke of Bragança, who was crowned King João IV of Portugal on December 1, 1640.
After the death of his first wife, Juan Fernández de Velasco married Joana Fernández de Córdova y Enríquez. They had three children:
- Bernardino Fernández de Velasco, 6th Duke of Frias, married Isabel Maria de Guzmán
- Luis de Velasco, 1st Marquis del Fresno, married Catarina de Velasco
- Mariana Fernandez de Velasco, married António Alvarez de Toledo, 7th Duke of Alba.
He inherited the title of Constable of Castile of his father and was present at the signing of the Treaty of London (1604).
Juan Fernández de Velasco was also Governor of the Duchy of Milan in the period 1592-1600 and 1610-1612. In 1595 he led the Spanish forces in the Battle of Fontaine-Française against the French, where he let victory slip through his fingers, due to excessive caution.
