She was born circa 1780. Her father was Juan Manuel Guerra Cañamar, and her mother was Maria Isabel Treviño.
In 1782, she lived in Mier in household number 35. The church census recorded that she was a young child, española, and 2 years old. Her household included 6 people:
Juan Manuel Guerra Cañamar, married, español, age 40.
Isabel Maria Treviño, married, española, age 26.
Jose Francisco Guerra Cañamar, a young child, español, age 6.
Antonio Matias Guerra Cañamar, a young child, español, age 5.
Maria Tomasa Guerra Cañamar, a young child, española, age 2.
Jose Ysidoro Guerra Cañamar, a young child, español, age 1.
In 1791, she lived in Mier in household number 31. The church census recorded that she was a child, española, and 11 years old. Her household included 12 people:
Dn Juan Manuel Guerra Cañamar, married, español, age 49.
Da Isabel Maria Treviño, married, española, age 39.
Jose Francisco Guerra Cañamar, single, español, age 14.
Antonio Matias Guerra Cañamar, a child, español, age 13.
Maria Tomasa Guerra Cañamar, a child, española, age 11.
Jose Ysidoro Guerra Cañamar, a child, español, age 10.
Maria Segunda Guerra Cañamar, a child, española, age 8.
Jose Antonio Guerra Cañamar, a child, español, age 6.
Jose Mateo Guerra Cañamar, a child, español, age 5.
Maria Encarnacion Guerra Cañamar, a young child, española, age 3.
Juan Jose Guerra Cañamar, a young child, español, age 1.
Antonia Rita Guerra, a child, india, age 10.