He was born circa 1657. His father was Diego Garcia de Quintanilla, and his mother was Mariana Saldivar de Sosa.
He married Beatriz de los Santos Rojo Ruelas (de Valle), daughter of Pedro de los Santos Rojo Ruelas and Maria del Valle.
Lucia Garcia de Quintanilla (de Saldivar), baptized 2 Jan 1678. She married Miguel Rodriguez de Montemayor, son of Diego Rodriguez de Montemayor and Maria Ines de la Garza Gonzalez Hidalgo.