Juan Martínez de Medrano
Juan Martínez de Medrano y Aibar (Basque: Ganix, Spanish: Juan, French: Jean; 13th century – December 1337–May 1338), nicknamed the Elder, was the regent of the Kingdom of Navarre from 13 March 1328 until 27 February 1329, and a judge of the Navarrese Cortés. He was a Baron and Lord of Arróniz, Sartaguda, Fontellas, Monteagudo, and Villatuerta, holding the highest noble dignity in the Kingdom of Navarre: that of ricohombre.