See:

• Frederick II, Holy Roman Emperor (1194–1250, king 1211/12–1250, emperor since 1220)
• Frederick II of Austria (?–1246, duke of Austria 1230–1246)
• Frederick II of Sicily (1272–1337), also called Frederick III
• Frederick II, Elector of Saxony (1412–1464)
• Frederick II, Margrave of Brandenburg (1413–1470, margrave 1440–1470)
• Frederick II of Denmark and Norway (1534–1588, king 1559–1588)
• Frederick II of Prussia (1712–1786, king 1740–1786), better known as "Frederick the Great"
• Frederick II of Hesse-Kassel (1720–1785) Landgrave of Hesse-Kassel
• Frederick II, Duke of Swabia (1090–1147)

פרידריך השני | Frederik II | フリードリヒ2世 | Frederico II | Фридрих II (значения) | Fredrik II | 腓特烈二世