He married Leonese lady Elvira de Quiñones, fighting in 1438, aged 19, in the conquest of Huelma, in the Nasri kingdom of Granada, near the border with the Jaén Christian territories and in 1445 in the First Battle of Olmedo, May 1445. When his father, Íñigo, 1st marquis of Santillana died in 1458, he received the village of Tendilla as well as Aranzueque, Armuña de Tajuña and Fuentelviejo being awarded in 1470 the title of Señor, (Sieur) of Huete, buying in 1475 Loranca de Tajuña to the count of Medinaceli, Luis de la Cerda, 1st duke of Medinaceli, dukedom awarded to his neighbor by ruling Queen Isabel I of Castile and her ruling husband Fernando II de Aragón on 31 October 1479.