He was born circa 1705. His father was Juan Guerra Cañamar, and his mother was Elena Cavazos.
He married Micaela Geronima de la Garza, daughter of Teodoro de la Garza and Maria Gonzalez de Quintanilla.
Maria Dominga Guerra. She married Joseph Cayetano Canales, son of Joseph Canales and Antonia Rafela del Bosque.