When Miguel Erdocia Iraurgui was christened on 23 March 1762, in Etxarri-Aranatz, Navarre, Spain, his father, Miguel Erdocia, was 30 and his mother, Catalina Iraurgui, was 32. He married Juana Isabel Belza, Miguel Echarri on 7 February 1785, in Lizarragabengoa, Oco, Navarre, Spain. They were the parents of at least 5 sons. He died on 15 April 1819, in his hometown, at the age of 57.