Johann Frenzel
Johann Frenzel is the name of the following people:
- Johann Frenzel (piano maker) , piano maker
- Johann Gottlieb Frenzel (1715–1780), German lawyer, historian and philosopher
- Johann Gottfried Abraham Frenzel (1782–1855), German engraver
- Johann Samuel Traugott Frenzel (1746–1807), German doctor, scientist and lecturer