Stelzer is a surname. Notable people with the surname include: Adolf Stelzer (1908–1977), Swiss footballer Andrea Stelzer (born c. 1965), South African beauty queen Hannes Stelzer (1910–1944), Austrian film actor Howard Stelzer (born 1974), American classical composer Irwin Stelzer (born 1932), American economist Michael Stelzer (born 1964), American judge Simone Stelzer (born 1969), Austrian pop singer Thomas Stelzer (diplomat), Austrian diplomat Thomas Stelzer (politician), governor of Upper Austria See also Stelzer engine, is a two-stroke opposing-piston free-piston engine design proposed by Frank Stelzer References Surnames from nicknames