- Frederick. Frederick I(def 1).
- the planning and operational code name the Germans gave to their invasion of the Soviet Union (June 22, 1941).
- Aruj, died 1518, Barbary pirate, born in Greece.
- Khair ed-Din, c1466–1546, Barbary pirate, born in Greece (brother of Barbarossa I).
- the nickname of the Holy Roman Emperor Frederick ISee Frederick Barbarossa
- real name Khair ed-Din . c . 1465–1546, Turkish pirate and admiral: conquered Tunis for the Ottomans (1534)