Alonso de Idiáquez Butrón y Múgica

Alonso de Idiáquez Butrón y Múgica[1] (14 February 1565 – 27 September 1618) was a Spanish nobleman, soldier and councillor.

[2] Born in San Sebastián, Alonso was the only son and heir of Juan de Idiáquez y Olazábal and Mencía Manrique Butrón y Múgica.

With a royal dispensation from Philip II, he joined the Order of Santiago as a knight in November 1583 and was appointed comendador of Vitoria.

In 1585, he accompanied Philip II's daughter, Catalina, to the Duchy of Savoy for her marriage to Charles Emmanuel I.

He was one of hundres of young Spanish noblemen who flocked to Flanders in hopes of participating in an invasion of England.