New Christian of Jewish descent he was an early founder of Saltillo. He received a land grant from Alberto del Canto in 1577.

Source Raul Longorias Database http://www.raullongoria.net/Genealogy/FamilyTree/b188.html#P956

Baltasar de SOSA was elected as Mayor of Saltillo in 1583 in Saltillo, Coahuila, New Spain. Baltasar de Sosa was one of the 15 settlers who came with Diego Montemayor when he founded the city of Monterrey in 1596.
Spouse: Ines RODRIGUEZ. Baltasar de SOSA and Ines RODRIGUEZ were married. A census of the Villa of Cerralvo (Monterrey) conducted on September 4, 1626, noted that Lucas Garcia and his family did not have a house at that time and that they lived in the house of his brother Diego Rodriguez. Diego Rodriguez' dwelling is described as being 50 paces from and facing the Convent of San Francisco. The dwelling contained 2 rooms and "un torrecilla alta", or small tower. Diego Rodriguez and his family lived in one of the rooms, his brother Lucas Garcia lived in the other room, and Diego Rodriguez' son-in-law Miguel de Montemayor lived with his family in the small tower. Children were: Capt. Diego RODRIGUEZ, Maria RODRIGUEZ, Capt. Lucas GARCIA.