He was born circa 1745. His father was Vicente de Alderete, and his mother was Juana Rosa Ramon.
He married Maria Guadalupe Antonia Ecay Muzquiz, daughter of Jose Joaquin de Ecay Muzquiz and Mariana de la Garza Falcon on 5 Feb 1770 in Santa Rosa. He was 25 years old, and the bride was 30 years old. Marriage source: link.