He was born circa 1757. His father was Francisco Guerra, and his mother was Ana Josefa de la Garza. His father owned Mier 66 grant.
He married Maria Rosalia Hinojosa, daughter of Manuel Hinojosa [Jr.] and Juana Sanchez on 6 Aug 1794. He was 37 years old, and the bride was 34 years old. Her father owned Mier 5 grant.
In 1782, he lived in Mier in household number 36. The church census recorded that he was single, español, and 25 years old. His household included 8 people:
Don Francisco Antonio Guerra Cañamar, married, español, age 72.
Doña Ana Josefa de la Garza, married, española, age 60.
Maria Leonor Guerra Cañamar, an unmarried girl, española, age 42.
Jose Tomas Guerra Cañamar, single, español, age 25.
Maria de los Santos Guerra Cañamar, an unmarried girl, española, age 22.
Jose Silverio Guerra Cañamar, single, español, age 21.
Lucia Guerra, an unmarried girl, casta, age 20.
Julian Guerra, a youth, casta, age 14.
In 1791, he lived in Mier in household number 30. The church census recorded that he was single, español, and 33 years old. His household included 6 people:
Da Ana Josefa de la Garza, a widow, española, age 69.
Maria Leonor Guerra Cañamar, an unmarried girl, española, age 51.
Jose Tomas Guerra Cañamar, single, español, age 33.
Maria Tomasa Guerra, a child, española, age 8.
Jose Silverio Guerra Cañamar, a widower, español, age 30.
Juan Jose Guerra, a young child, español, age 6.