Maria Francisca Sanchez was born circa 1776, the daughter of Antonio Sanchez Solis and Maria Caterina Guerra.
In 1782, she lived in Mier. The church census recorded that she was a young child, española, and 6 years old. Her household included 3 people:
Antonio Gregorio Sanchez Solis, español, married, age 29.
Maria Caterina Guerra Cañamar, española, married, age 23.
Maria Francisca Sanchez, española, a young child, age 6.