Maria Josefa Rubio was born circa 1765, the daughter of Juan Rubio and Juana Bautista (Margarita) Mendez.
In 1782, she lived at Junta de los Rios. The church census recorded that she was an unmarried girl, casta, and 17 years old. Her household included 9 people:
Juan Rubio, casta, married, age 31.
Juana Bautista (Margarita) Mendez, casta, an unmarried girl, age 37.
Maria Trinidad Rubio, casta, an unmarried girl, age 18.
Maria Josefa Rubio, casta, an unmarried girl, age 17.
Jose Pio Rubio, casta, a child, age 13.
Jose Rafael Rubio, casta, a child, age 7.
Jose Guillermo Rubio, casta, a child, age 7.
Jose Maria de Jesus Rubio, casta, a young child, age 3.
Maria Tadea de la Cruz, india, single, age 61.