He was born circa 1560. His father was Diego de Montemayor, and his mother was Maria de Esquivel. He died before 23 Jun 1614. He was 54 years old. One of the 12 original settlers of Monterrey.
He married Elvira de Renteria, daughter of Juan Fernandez de Castro and Mayor de Renteria.
Diego Fernandez de Montemayor. He married Juliana de las Casas, daughter of Bernabe de las Casas and Maria Beatriz Navarro Rodriguez.