Álvaro Núñez de Lara (died 1287)

His paternal grandparents were Nuño González de Lara "el Bueno", head of the House of Lara, and his wife Teresa Alfonso; his maternal grandparents were Álvaro Pérez de Azagra, Lord of Albarracín, and his wife, Inés, illegitimate daughter of King Theobald I of Navarre.

[2] In 1283 Álvaro Núñez de Lara abandoned infante Sancho and defected to the side of his father King Alfonso.

On 6 December infante Ferdinand, the son of King Sancho and Queen María de Molina and heir to the throne of Castile and León, was born.

In 1286, due to his hostility toward Lope Díaz III de Haro, the king's favorite, he left Castile and headed for Portugal.

Denis, who enjoyed good relations with King Sancho, thereupon ordered the councils of the border towns to attack his brother and Álvaro Núñez de Lara, who lost many of their men in several skirmishes with the Portuguese troops.

Álvaro Núñez de Lara died at the beginning of 1287, shortly after his return to Castile, without having married and without leaving any children.