The Brotherhood of the Sixth Merindad. This solidarity group, similar to others in the country and to the European brotherhood associations that proliferated at this time, was established or perhaps ratified by Clement de Launay, steward of Theobald II of Nav., on November 26, 1258, to bring together the inhabitants of the towns and valleys that made up the Castellana de San Juan. Equipped with a chaplain and statutes, it held brotherhood meetings, for which it had a place provided with guarantees of immunity under severe prohibitions for anyone who dared to attack another to harm them (Comptos). In all likelihood, based on this brotherhood, the first popular militias independent of those erected by the or surname arose. In the 15th century it had three presidents, that of San Juan de Pie de Puerto, that of Mixe and that of Cize: In the 16th century. In the 16th century this brotherhood was still operating, with Jean de Olce being one of its presidents.