Mitsuyo Maeda
Brazilian Jiu-Jitsu was developed around 1920 by Brazilian brothers Carlos, Oswaldo, Gastão Jr., George, and Hélio Gracie, after Carlos was taught traditional Kodokan judo by a travelling Japanese judoka, Mitsuyo Maeda, in 1917. Later they developed their own self-defense system named Gracie Jiu-Jitsu.