He was born circa 1781. His father was Juan Manuel Guerra Cañamar, and his mother was Maria Isabel Treviño.
He married Luisa Ramirez, daughter of Jose Matias Ramirez Peña and Maria Juliana Gonzalez in 1803. He was 22 years old. Her father owned Palo Blanco grant, Brooks County.
In 1782, he lived in Mier in household number 35. The church census recorded that he was a young child, español, and 1 years old. His 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, he lived in Mier in household number 31. The church census recorded that he was a child, español, and 10 years old. His 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.
In 1831, as the son-in-law of the original claimant, he was granted Palo Blanco. He applied for the land on behalf of the heirs of Matias Ramirez.