William Fullerton may refer to: William Fullerton (politician) (1888–?), Australian politician William Young Fullerton (1857–1932), Irish hymnwriter William Morton Fullerton (1865–1952), American journalist William Fullerton (lawyer) (1817–1900), American lawyer William Fullerton Jr. (1854–1888), his son, American-born composer in London Billy Fullerton, see the song Billy Boys William Fullerton (diplomat) (born 1939), British diplomat William Fullerton (surgeon) (died 1805), Scottish surgeon See also William Fullarton (disambiguation)