Background
He was the youngest son of Pedro González de Lara. His mother was Eva, who may have been a daughter of Pedro Froilaz de Traba, or perhaps a Frenchwoman.
He was the youngest son of Pedro González de Lara. His mother was Eva, who may have been a daughter of Pedro Froilaz de Traba, or perhaps a Frenchwoman.
She was originally married to García Ordóñez, but was married to Pedro by November 1127 at the latest. Álvaro is mentioned in documents between 8 February 1141 and 10 May 1172. He held the tenencia of Aguilar de Campóo for a long time early in his career (1146-1165).
He also patronised the Praemonstratensian monastery there.
On 15 February 1149 he called himself filius comitis ("the count"s son") in a document, perhaps to indicate his aspiration for a comital title. He is first recorded as a count (Latin comes), the highest title granted in the kingdom, on 19 November 1166.
During the latter part of his career, Álvaro ruled Asturias de Santillana (1156-1170) and briefly held the tenencia of Burgos (1168), the top military post in the capital of Castile. He also briefly held the tenencias of Grajal (1162) and Viesgo (1155).