Terrill is a third generation maker of Apache violins, which is a traditional instrument that is increasingly threatened by extinction. His grandfather, great-grandfather, uncles, and great-uncles were also skilled at crafting Apache violins. Terrill is an award winning artist who also creates large scale photo-realistic pencil drawings that show living family members depicted in visual stories filled with Apache symbols. His hometown is Bylas, AZ on the San Carlos Apache Reservation.