The first known reference to a member of this family from Soule is a text dating to the 15th century which mentions Garzia Belaz de Medrano, a noble from Navarre.
Athanasius of Belapeyre, the son of the Protestant Jacques de Bela and among the family's more prominent members, became a Catholic priest and ascended to the office of vicar general.
He soon reached the rank of cadet, but after a perceived slight by the captain of his regiment, Bela challenged him to a duel and was subsequently imprisoned, but he managed to escape and fled to Germany, where he joined the bodyguard of King Augustus III of Saxony.
Shortly after Bela managed to escape and retired to his homeland, having received a diploma of appreciation from the Polish King, naming him captain of his Royal Guard.
Bring by his interest in the material progress of their fellow citizens, he translated into Basque works on Agriculture and economics, the quartermaster on duty refused to publish at the public expense.
He also tried by various means obtain a small monopoly of wool knits for Mauleón, but their proposals were denied him by the Mayor; Workshop manufacture organized worked until four years before his death.
His habit of greatness took him to invent a false pedigree, which was closely related with the nobles Belaz de Medrano, for whose descendants signed a testament on March 1, 1793.