He was born circa 1625. His father was Francisco Baez de Benavides Lopez, and his mother was Isabel Martinez Guajardo Navarro.
He married __ Sepulveda.
Maria Sepulveda de Benavides, born 1645. She married Bartolome Olivares Treviño, son of Juan de Olivares and Juana de Treviño on 25 Dec 1673 in Monterrey.