She was born 1 Apr 1768, and was baptized 15 Apr 1768 in Mier. Her father was Antonio Montalvo, and her mother was Maria Petra Salinas. Her father owned Mier 54 grant. Her padrino was Dn Francisco Guerra, and her madrina was Ana Josefa de la Garza.
She married Jose Salvador de Olivares, son of Jose Antonio Olivares and Maria Catarina Peña on 4 Jul 1785 in Mier. She was 17 years old, and the groom was 24 years old. Their padrino was Jose _ Lopez, and their madrina was Manuela Flores. His father owned Mier 17 grant.
In 1782, she lived in Las Jaras in household number 108. The church census recorded that she was an unmarried girl, española. Her household included 14 people:
Don Antonio Montalvo, married, español.
Maria Petra Salinas, married, española.
Maria del Carmen Montalvo, an unmarried girl, española.
Francisco Ignacio Montalvo, a youth, español.
Maria Josefa Montalvo, an unmarried girl, española.
Maria Cirila Montalvo, an unmarried girl, española.
Maria Teodora Montalvo, an unmarried girl, española.
Jose Antonio Montalvo, a child, español.
Maria Rosa Montalvo, a child, española.
Francisco Antonio Montalvo, a young child, español.
Juana Maria Montalvo, a young child, española, age 4.
Maria Gertrudis Montalvo, a young child, española, age 3.
Maria Antonia Montalvo, a young child, española, age 2.
Joaquin Montalvo, español, age 48.