- Hart, Moss Hart - United States playwright who collaborated with George S. Kaufman (1904-1961)
--1 is a kind of dramatist, playwright
- Hart, Lorenz Hart, Lorenz Milton Hart - United States lyricist who collaborated with Richard Rodgers (1895-1943)
--2 is a kind of lyricist
- hart, stag - male red deer
--3 is a kind of red deer, Cervus elaphus