Most of the people in these mixed groups spoke both languages. The headman of each band usually had two names, one from each culture. Therefore the enemy Navajo to the north called both, the Tonto Apache and their allies, the Yavapai, "Dilzhʼíʼ dinéʼiʼ" – "People with high-pitched voices." The ethnic Europeans referred to the Yavapai and Apache together as "Tonto" or "Tonto Apache." The peoples raided and warred together against enemy tribes such as the "Tohono O'odham" and the "Akimel O'odham".