Otto Engelhardt

Otto Engelhardt is the name of the following people:

• Otto Engelhardt (engineer) (1866–1936), German-Spanish engineer and patron
• Otto Engelhardt (lepidopterist) (1910–1995), German physician and butterfly scientist
• Otto Engelhardt-Kyffhäuser (1884–1965), German painter and art teacher

This is a disambiguation page for differentiating between several terms identified with the same word.