She was born circa 1781. Her father was Pedro Regalado Guerra Cañamar, and her mother was Margarita Barrera.
In 1782, she lived in Mier in household number 37. The church census recorded that she was a young child, española, and 1 years old. Her household included 4 people:
Pedro Regalado Guerra Cañamar, married, español, age 44.
Margarita Barrera, married, española, age 28.
Jose Anacleto Guerra Cañamar, a young child, español, age 1.
Juana Guerra Cañamar, a young child, española, age 1.