Tello de Castilla, Lord of Aguilar de Campoo

Tello Alfonso of Castile was the seventh of the ten illegitimate children of Alfonso XI of Castile and Eleanor of Guzman. He was a prince of Castile and First Lord of Aguilar de Campoo. In Spanish he is known as Tello de Castilla, Infante de Castilla; Señor de Aguilar de Campoo, de Vizcaya, de Castañeda y de Lara.