Sancho III of Navarre
It was around 1023 that King Sancho III of Navarre founded the fief of the Viscounty of Baigory in favour of Garcias Lop who was related. The creation of the hamlet itself, on the viscounts' lands, therefore dates back to this period. Thus from the 11th century the status of houses at Anhaux was defined by the writer Jean-Baptiste Orpustan. He provided a list of houses existing in the Middle Ages in Anhaux. This document was created from the archives from 1350, 1366, and 1412.