John Arthur Johnson(March 31 1878 – June 10 1946), better known as Jack Johnson and nicknamed the "Galveston Giant", was an American boxer and arguably the best heavyweight of his generation. He was the first black Heavyweight Champion of the World, 1908-1915. In a documentary about his life, Ken Burns said: "For more than thirteen years, Jack Johnson was the most famous, and the most notorious, African-American on Earth".

Jack Johnson (born Jack Hody Johnson, May 18, 1975) http://www.e-hawaii.com/stars/index/jack_johnson/default.htm is a Hawaii-born singer-songwriter who has achieved commercial success and a dedicated following since the release of his debut album, Brushfire Fairytales. His latest album is Sing-A-Longs and Lullabies for the Film Curious George.

John McLellan Johnson (born August 20, 1930 in Detroit, Michigan) is a former politician in Ontario, Canada. He served in the Legislative Assembly of Ontario as a Progressive Conservative from 1975 to 1990.

A large German or Austrian low-velocity shell. Facetious use of personal name.