The Pellendones, also designated Pelendones Celtiberorum[1] and Cerindones,[2] were an ancient pre-Roman Celtic people living on the Iberian Peninsula.
From the early 4th century BC they inhabited the region near the source of the river Duero[3] in what today is north-central Spain, an area comprising the north of Soria, the southeast of Burgos and the southwest of La Rioja provinces.
Closely related with both the Arevaci – to whom they were a dependant tribe, though regarded as a separated people[10] – and the Vettones, they threw off the Arevacian yoke possibly with Roman help in the late 2nd century BC,[11] receiving the town of Numantia and respective lands when the Romans partitioned the territory of the defeated Arevaci amongst their neighbours.
[12][13] However, they lost these lands to the Uraci after supporting the ill-fated early 1st Century BC anti-Roman uprisings in Celtiberia (the 4th Celtiberian War).
In the late 1st Century BC, the Pellendones were aggregated to the new Hispania Terraconensis province created by Emperor Augustus, who founded on the site of Arekorata the Roman colony of Augustobriga (Muro de Ágreda) in their territory.