William Dennis (1856–1920) was an Independent Conservative member of the Senate of Canada. William Henry Dennis (1887–1954), his nephew and Canadian Conservative senator from 1912 to 1920

William or Billy Dennis may also refer to: Billy Dennis (English footballer) (1896–1952), English footballer Willie Dennis (1926–1965), American jazz musician Willie D (born 1966), rapper Bill Dennis (born 1935), NASCAR driver William Lockyer Dennis (1853–1919), English-born American politician William M. Dennis (1810–1882), American businessman and politician William S. Dennis (fl. 1910s), American captain of the Vanitie yacht in the America's Cup trials Will Dennis (born 2000), English footballer

See also