Hello Robert: I have lots of info on the Otero, related to Pedro Otero Duran y Chavez, however, I don't show a daughter with the name of Elvira. So, I can't help you with that, however, I show an Elena Aragon daughter of Migel Antonio Aragon and Maria Antonia Rita Sanchez. This Elena married Francisco Antonio Otero in 1823 in Tome, Valencia Co, New Mexico. You said you have lots of info on the Aragon, do you know if this branch is related to you? Regards.