House of Lara
In 1311, Lope Diaz IV participated in a rebellion against King Ferdinand IV of Castile together with the infante John of Castile and Juan Núñez II de Lara, head of the House of Lara. Their rebellion favored the overthrow of Ferdinand IV and the installation of his brother, the infante Pedro de Castilla y Molina instead. Eventually, the rebellion faltered after a lack of support from the queen consort, María de Molina.