Juan Francisco Saenz was baptized on 20 Oct 1767 in Mier, the son of Juan Francisco Saenz and Maria Teresa Peña. His padrino was Dn Jose Luis Lopez, and his madrina was Da Ana Polonia Lopez (sister).
He married Maria Agustina Garcia on 21 Nov 1791 in Mier.
Julian Saenz married Maria Rosalia Izaguirre.
In 1782, he lived at San Pedro de las Flores. The church census recorded that he was a child, español, and 14 years old. His household included 9 people:
Juan Francisco Saenz, español, married, age 53. He was the ranch owner.
Maria Teresa Peña, española, married, age 49.
Jose Felipe Saenz, español, a youth, age 19.
Jose Gabriel Saenz, español, a youth, age 18.
Juan Francisco Saenz, español, a child, age 14.
Maria Gertrudis Saenz, española, a child, age 11.
Maria Josefa Saenz, española, a child, age 9.
Jose Antonio Saenz, español, a child, age 7.
Jose Francisco Saenz, español, a young child, age 3.