As the three Opatan dialects were similar, and all three groups lived adjacent to one another, Franciscan missionaries had by about 1800 lumped them together into one group they called "Opata." Several Franciscan missionary records and subsequent anthropological accounts state that “Opata” was borrowed from a Pima Indian word meaning “enemy,” the name allegedly given by the northern and southern Piman peoples to their Opatan neighbors. However, according to Opatan oral traditionalists, “Opata” is the name some Tehuima villages gave to themselves and means “iron people,” since iron ore was abundant in Opata territory, and Opata spear tips were made from iron ore. Thus, those Tehuima people were also known as “the iron spear people.” Some anthropological texts state that the “Opata” referred to themselves collectively in their own language as “Joylraua.” However, according to Opata oral traditionalists, Joylraua was the name of an ancient Eudeve village named after an honored chieftain of that village.