He was born circa 1772. His father was Matias Ventura (Alvarez), and his mother was Maria Zapopa Gonzalez.
In 1782, he lived in Santa Gertrudis / San Jose de la Rinconada in household number 83. The church census recorded that he was a child, casta, and 10 years old. His household included 7 people:
Mathias Ventura (Alvarez), married, casta.
Maria Zapopa Gonzalez, married, española.
Jose Rafael Ventura, casta.
Jose Antonio Ventura, a child, casta, age 10.
Jose Maria Ventura, a child, casta, age 8.
Pedro Ventura, a young child, casta, age 6.
Maria Concepcion Ventura, a young child, india, age 1.