Villahoz was likely founded in the late 9th century by
Mozarab settlers, Christians who had migrated north to escape Islamic rule in central and southern parts of the Iberian Peninsula. The origin of the name is uncertain but may be Mozarabic. The earliest known written reference to Villahoz appears in the Carta de Arras of El Cid from 1079, where it is recorded as Villa Fabze. The same document mentions Escobare and Matricale, two former settlements now within the municipality's boundaries. During the Middle Ages, Villahoz was classified as a behetría, a type of settlement where inhabitants could freely select their lord. By the end of the period, it had become part of the royal domain (realengo). It is listed in the Becerro de las Behetrías under the jurisdiction of the Merindad of Cerrato, though at times it was also associated with the Merindad of Candemuñó. The town experienced a period of relative prosperity from the late Middle Ages through the 16th century, after which it entered a gradual decline. ==Demographics==