Marcos was born about 1710. Marcos Baca ... 
LDS FamilySearch.org, "New Mexico Marriages, 1751-1918," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FDPD-YQQ : 12 December 2014), Marcos Baca in entry for Juan Domingo Sanches and Maria Rosalia Baca, 15 Mar 1763; citing San Felipe Catholic, Albuquerque, Bernalillo, New Mexico, reference 2:1S60SW1; FHL microfilm 16,643.
Have you taken a DNA test for genealogy? If so, login to add it. If not, see our friends at Ancestry DNA.