Maria Ignacia Guerra Cañamar was born circa 1763, the daughter of Ramon Guerra and Rosalia Hinojosa.
She married Jose Lopez de Jaen on 1 May 1782 in Mier.
In 1782, she lived at San Lorenzo de las Minas. The church census recorded that she was an unmarried girl, española, and 19 years old. Her household included 8 people:
Don Jose Ramon Guerra Cañamar, español, a widower, age 65. He was the ranch owner.
Jose Antonio Guerra Cañamar, español, single, age 29.
Jose Alejandro Guerra Cañamar, español, single, age 22.
Maria Ignacia Guerra Cañamar, española, an unmarried girl, age 19.
Maria Juana Francisca Guerra Cañamar, española, an unmarried girl, age 18.
Maria Graciela Guerra Cañamar, española, an unmarried girl, age 16.
Vicente Guerra Cañamar, español, a child, age 15.
Jose Ignacio Guerra Cañamar, español, a child, age 11.