Johann Dreyer
Johann Dreyer is the name of the following people:
- Johann Carl Heinrich Dreyer (1723–1802), German legal scholar and politician, see Carl Henrich Dreyer
- Johann Heinrich Dreyer (1670–1737), businessman and mayor of Lübeck
- Johann Matthias Dreyer (1717–1769), German writer, journalist and diplomatic agent
- Johann Melchior Dreyer (1746 / 1747-1824), German composer
- Johann Traugott Dreyer von der Iller (1803–1871), imperial major general, general staff doctor, ophthalmologist and university professor
See also:
- Johan Ludvig Emil Dreyer (1852–1926), Danish astronomer
- Johan FL Dreier (1775–1833), Norwegian painter, draftsman and illustrator