Hi Margarita:
In the Coahuila-Nuevo Leon area, there are multiples families that have as your ancestors the "Zaldívar" from Zacatecas. In my family tree I have ancestors with Zaldívar surname: 1) Vicente de Zaldívar y Reza who born about 1599/1601 in Zacatecas and dead about 1661 en Saltillo, Nueva Vizcaya, he was son of Juan Guerra de Reza and Magdalena or Ana de Mendoza; Vicente married twice, one with María de Sosa, daughter of Alonso de Farías and Ana de Sosa, for this couple I have seven children in my records: Vicente, Mariana, Agustín, Margarita, Inés, Ana and María; the second marriage was with Juliana de las Casas (when she was widower of Vicente, then married with Diego Fernández de Montemayor, her second husband), Juliana was daughter of Bernabé de las Casas and Beatriz Navarro y Rodríguez; in my information, their had only a
son: Juan. Vicente Sr. was the companion of Juan de Oñate to the Nuevo Mexico expedition; Vicente is the father of various important people that