He was born circa 1747. His father was Miguel Lopez de Jaen, and his mother was Maria Gertrudis Longoria.
He married Maria Antonia Gonzalez, daughter of Francisco Gonzalez and Marcelina Salinas on 18 Feb 1775 in Mier. He was 28 years old, and the bride was 19 years old.
Juana Maria Lopez, born 1778.
Maria Gertrudis Lopez, born 1779. She married Jose Julian Olivares, son of Jose Antonio Olivares and Maria Catarina Peña on 8 Feb 1797.
Jose Rafael Lopez, born 1780.
Miguel Lopez de Jaen, head of household, español
Maria Gertrudis Longoria, wife, española
Jose Cayetano Lopez de Jaen, son, 5 years old
Maria Gertrudis Lopez de Jaen, daughter, 4 years old
In 1782, he lived in San Juan Bautista del Cojo in household number 134. The church census recorded that he was married, español, and 34 years old. His household included 6 people:
Jose Cayetano Lopez de Jaen, married, español, age 34.
Maria Antonia Gonzalez, married, española, age 26.
Juana Maria Lopez, a young child, española, age 4.
Maria Gertrudis Lopez, a young child, española, age 3.
Jose Rafael Lopez, a young child, español, age 2.
Juan Antonio Santos, a youth, español, age 15.