- Frederick I(def 2).
- Frederick the Great, 1712–86, king of Prussia 1740–86 (son of Frederick William I).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 1194–1250, Holy Roman Emperor (1220–50), king of Germany (1212–50), and king of Sicily (1198–1250)
- See Frederick the Great