Pedro de Peralta y Ezpeleta

Pedro de Peralta y Ezpeleta, called the Younger (1421–c. 1492), was constable of Navarre and leader of the Agramont faction against the Beaumont party in the Navarrese Civil War of 1451–1455. John II made him first Count of Santisteban de Lerín and lord of Peralta, Falces and other towns.

He married Anne of Brabant, an illegitimate daughter of Anthony of Burgundy, in 1440, and Isabel de Foix in 1462. He later backed the Catholic Monarchs, receiving titles in return for supporting the marriage of Isabella of Castile and Ferdinand of Aragon in 1469.