John Will completed his blackbelt under one of these men, a brother renowned for his BJJ skills?
John Will: John Will (born (1957--)16 1957 ) is a notable martial artist from Australia. Jean Jacques Machado: Jean Jacques Machado is one of the five Machado brothers, including Carlos, Roger, Rigan and John, renowned for their Brazilian Jiu-Jitsu (BJJ) skills.
i don't know