William Rosenberg (1916–2002) was an American entrepreneur who founded Dunkin' Donuts. William Rosenberg may also refer to: Wilhelm Ludwig "William" Rosenberg (1850–1930s), German-American teacher, poet, playwright, journalist, and socialist political activist William Rosenberg (actor) (1920–2014), Danish actor S. William Rosenberg (1916–1990), American politician in New York William Frederick Henry Rosenberg (1868-1957), English naturalist and natural history dealer See also William of Rosenberg (1535–1592), Bohemian nobleman