Brilliant (Billy) Chang (real name Chan Nan;[1] born c. 1886,[2] death date unknown) was a Chinese restaurateur and drug dealer who was implicated in supplying the drugs that killed Freda Kempton in 1922.[2][3] The British popular press portrayed him as an international drug mastermind and the "Dope King" of London.[4]
Kohn
was invoked but never defined (see the help page).