His father was Juan Flores de Abrego, and his mother was Melchora de la Garza.
He married Micaela de la Garza, daughter of Miguel de la Garza Falcon and Gertrudis de Renteria.
Gertrudis Flores de Abrego. She married Nicolas de Cardenas Pinillas, son of Alonso de Cardenas and Juana de Treviño.