Gelzer is a surname. Notable people with the surname include:
Heinrich Gelzer (1847–1906), German classical scholar and writer on Armenian mythology Jay Gelzer (1889–1964), American writer Johann Heinrich Gelzer (1813–1889), Swiss historian and diplomat, father of Heinrich Gelzer Matthias Gelzer (1886–1974), a Swiss-German classical historian, known for his studies of the Roman Republic
See also