She was born circa 1778. Her father was Antonio de Jesus Barrera, and her mother was Maria Teresa Salinas.
In 1782, she lived in San Salvador in household number 78. The church census recorded that she was a young child, española, and 4 years old. Her household included 5 people:
Antonio de Jesus Barrera, married, español, age 33.
Maria Teresa Salinas, married, española, age 26.
Juana Maria Barrera, a young child, española, age 6.
Maria Calistra Barrera, a young child, española, age 4.
Jose Andres Barrera, a young child, español, age 1.