Baltasar de Acosta
- Marriage: Luisa de la Vega
 Noted events in his life were:
• Web Reference: Mascareñas-Acostas Family of New Mexico: Maternal Genealogy.
En 23 <de marzo 1664>
Francisca del Castillo, mestiza, natural y vesina desta ciudad, hija de Juan de Cornexo y de Josepha del Castillo
Con
Nicolas de Acosta, natural y vesino desta ciudad, hijo de Baltasar de Acosta y de Luisa de la Vega
On 23 <March 1664>
Francisca del Castillo, mestiza, native and resident of this city, daughter of Juan de Cornejo and Josefa del Castillo
With
Nicolas de Acosta, native and resident of this city, son of Baltasar de Acosta and Luisa de la Vega
This document reveals the grandparents of María de Acosta. Her paternal grandparents were Baltasar de Acosta and Luisa de la Vega; and her maternal grandparents were Juan de Cornejo and Josefa del Castillo. Also, Francisca del Castillo, María's mother, was mestiza, or half Spanish and half Native American.
It was not uncommon in Spanish society for siblings from one family to marry siblings from another family. While marriage records for Juan de Cornejo and Josefa del Castillo, as well as Baltasar de Acosta and Luisa de Vega, have proven to be elusive, the practice of siblings marrying siblings as demonstrated in the following marriage record gives some clues as to the origins of the Acosta and Vega families of Mexico City:
En 20 <de enero 1649>
Joseph de Acosta, natural desta ciudad, hijo de Baltasar de Acosta y de Geronima Gutierres
Con
Teresa Ballesteros de la Vega, natural desta dicha ciudad, hija de Miguel Lopes de Villareal y de Mariana de la Vega
José de Acosta, native of this city, son of Baltasar de Acosta and Gerónima Gutiérrez
With
Teresa Ballesteros de la Vega, native of this city, daughter of Miguel López de Villareal and Mariana de la Vega
Given the name of José de Acosta's father, Baltasar de Acosta, it is logical he would have a son named the same. Therefore, Baltasar de Acosta, father of Nicolas de Acosta, is certainly the son of Baltasar de Acosta and Geronima Gutierrez, and the brother of Joseph de Acosta.
Furthermore, the similar and not too common surname of Vega, Teresa Ballesteros de la Vega is likely the sister of Luisa de la Vega, wife of Baltasar de Acosta, and mother of Nicolas de Acosta. If so, Luisa's parents are Miguel López de Villareal and Mariana de la Vega.
Research by Robert D. Martínez
Baltasar married Luisa de la Vega, daughter of Miguel López de Villareal and Mariana de la Vega. (Luisa de la Vega was baptized on 13 Apr 1608 in Ciudad de Méjico, Nueva España.)
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