He was born circa 1743. His father was Juan de Moya, and his mother was Maria de los Santos.
In 1750, he lived in Camargo. The census recorded that he was the son of a settler, and 7 years old. His household had 5 people, and they received government aid to move to the colony:
Juan de Moya, head of household
Maria de los Santos, wife
Estevan de Moya, son, 7 years old
Juan Jose de Moya, son, 5 years old
Apolinar de Moya, son