Friedenthal (German: "peace valley") may refer to:
- Karl Rudolf Friedenthal (1827-1890), Prussian statesman
- Markus Bär Friedenthal (1780/1-1859), Jewish merchant, landowner, writer
- Richard Friedenthal (1896-1979), German writer
Also
- (Anglicized) Lloyd Fredendall (1883-1963), American general
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