Bull, The Bull and Da Bull are nicknames.
Those so named include:
Nicknamed "Bull" unless otherwise noted.
Bill Adams (Australian footballer) (1900-1973), Australian rules footballer
Donnis Churchwell (born 1936), American former National Football League player
Bull Connor (1897–1973), American politician infamous for opposing desegregation in Birmingham, Alabama, in the 1960s
Johnny Davis (American football) (born 1956), former National Football League player
Ed Durham (1907-1976), American baseball pitcher
Leon Durham (born 1957), American baseball first baseman
William Halsey, Jr. (1882-1959), US Navy fleet admiral
Terry Jenkins (born 1963), English darts player nicknamed "The Bull"
Brooks Lawrence (1925-2000), American Negro National League and Major League Baseball pitcher
Frank McCaffrey, college football player and 1917 head football coach of Fordham University
Bull Montana (1887–1950), American professional wrestler and actor Lewis Montagna
William "Bull" Nelson (1824–1862), US Army major-general during the American Civil War and US Navy officer prior to the war
Greg Noll (born 1937), American surfing pioneer nicknamed "Da Bull"
Bull Polisky (1901–1978), American football player
Denver Randleman (1920-2003), non-commissioned officer in World War II, portrayed in the HBO series Band of Brothers
Alan Richardson (footballer born 1940), Australian footballer
Franz Roth (born 1946), German former footballer nicknamed "the Bull"
Edwin Vose Sumner (1797-1863), American Civil War Union Army general
Tsang Kin-shing (born 1957), Hong Kong politician