Marcelino (Mariano) Garcia was born circa 1771, the son of Joaquin Garcia and Rosalia Salinas.
He married Ana Gertrudis Gonzalez.
In 1782, he lived in Mier. The church census recorded that he was a child, español, and 11 years old. His household included 6 people:
Joaquin Garcia, español, married, age 55. He owned Rancho El Paso de los Arrieros but did not live there.
Maria Petra Izaguirre, española, married, age 21.
Jose Vicente Garcia, español, single, age 23.
Maria Lugarda Garcia, española, an unmarried girl, age 20.
Marcelino (Mariano) Garcia, español, a child, age 11.
Maria Agustina Garcia, española, a child, age 9.