Frederick III may refer to:
- Frederick III of Sicily (self-styled), also known as King Frederick II of Sicily, (1272–1337)
- Frederick III of Germany or Frederick the Fair, King of the Romans and previously Duke Frederick I of Austria, (1289–1330)
- Frederick III the Simple, king of Sicily, (1341–1377)
- Frederick III, Holy Roman Emperor, (1415–1493)
- Frederick III, Duke of Brunswick-Lüneburg, (1424-1495)
- Frederick III, Elector of Saxony, (1463–1525)
- Frederick III, Elector Palatine, (1515–1576)
- Frederick III, Duke of Holstein-Gottorp, (1597–1659)
- Frederick III of Denmark, (1609–1670)
- Frederick III of Brandenburg or Frederick I of Prussia, Elector of Brandenburg, (1657–1713)
- Frederick III, Duke of Saxe-Gotha-Altenburg, (1699-1772)
- Frederick III, German Emperor, (1831–1888)
Famous quotes containing the words frederick and/or iii:
“Science is the knowledge of many, orderly and methodically
digested and arranged, so as to become attainable by one. The
knowledge of reasons and their conclusions constitutes abstract, that of causes and their effects, and of the laws of nature, natural science.”
—John Frederick William Herschel (1792–1871)
“Knavery seems to be so much a the striking feature of its inhabitants that it may not in the end be an evil that they will become aliens to this kingdom.”
—George III (1738–1820)