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. The area comprises the north of Soria, the southeast of Burgos and the southwest of La Rioja provinces.