He was born circa 1787. His father was Gregorio Salinas, and his mother was Juana Maria Longoria.
In 1791, he lived in Mier in household number 40. The church census recorded that he was a young child, español, and 4 years old. His household included 4 people:
Jose Gregorio Salinas, married, español, age 29.
Juana Maria Longoria, married, española, age 20.
Juan Bautista Salinas, a young child, español, age 4.
Maria Gertrudis Salinas, a young child, española, age 2.