He was born circa 1768. His father was Manuel Hinojosa [Jr.], and his mother was Juana Sanchez. His father owned Porción 5, Mier. In 1782, he lived in Mier in household number 10. The church census recorded that he was a youth, español, and 14 years old. His household included 10 people, 2 of whom were likely servants. In 1791, he lived in Mier in household number 11. The church census recorded that he was married, español, and 23 years old. His household included 5 people.
He married Maria Gertrudis Saenz, daughter of Juan Francisco Saenz and Maria Teresa Peña on 16 Jan 1786. He was 18 years old, and the bride was 17 years old. Her father owned Porción 7, Mier.