Piegan Blackfeet
Martinez was born Adolfo Larrue Martínez III in Glendale, California. His family referred to him as "A", "Little Adolfo", and "Little A" as a child to distinguish him from his father and grandfather. Over time, "A" became the name he would use. His heritage is Mexican and Apache on his father's side, and Piegan Blackfeet and Northern European on his mother's side.