Located in the north of the province of Burgos, the Merindades are the birth place of the name "Castilla". Most of the villages of the Merindades were quoted in the "Becerro de Behetrias" at the moment of the creation of the subdivision Merindad by Pedro of Castile. Burgos province Burgos is a province of northern Spain, in the northeastern part of the autonomous community of Castile and León. ... Merindad is a Castilian or Spanish Medieval administrative term that refers to a territorial division smaller than a province but larger than a municipality. ... Pedro of Castile (1290, Valladolid – 1319), Infante of Castile and Lord of Los Cameros, was the son of Sancho IV of Castile and his wife Maria de Molina. ...