Frederick II
Frederick II, Frederik II or Friedrich II may refer to:
- Frederick II, Holy Roman Emperor, King of Sicily from 1198; Holy Roman Emperor from 1220
- Frederick II of Denmark, king of Denmark and Norway 1559–1588
- Frederick II of Prussia, king 1740–1786, better known as Frederick the Great
- Frederick II, Grand Duke of Baden
- Frederick II, Elector of Saxony
- Frederick II, Elector of Brandenburg, margrave 1440–1470
- Frederick II, Elector Palatine, elector 1544–1556
- Frederick II
- Frederick II, Duke of Upper Lorraine, count of Bar and duke of Lorraine, co-reigning with his father from 1019
- Frederick II, Duke of Swabia
- Frederick II, Duke of Lorraine
- Frederick II, Duke of Austria, Duke of Austria 1230–1246
- Frederick II, Duke of Brunswick-Lüneburg
- Frederick II, Duke of Holstein-Gottorp
- Frederick II, Duke of Saxe-Gotha-Altenburg
- Frederick II, Duke of Mecklenburg-Schwerin, called the Pious
- Friedrich II, Duke of Anhalt
- Frederik II van Sierck, bishop of Utrecht
- Frederick II, Margrave of Baden-Eberstein
- Frederick II, Margrave of Meissen
- Frederick II, Marquess of Saluzzo
- Frederick II, Landgrave of Hesse-Homburg, hero of Heinrich von Kleist's play Der Prinz von Homburg
- Frederick II, Landgrave of Hesse-Kassel
- Frederick II, Count of Diessen, bailiff of Regensburg cathedral
- Frederick II, Count of Celje, Ban of Croatia, Slavonia and Dalmatia
- Frederick II, Count of Vaudémont, Lord of Joinville
- Frederick II Eugene, Duke of Württemberg
- Frederick the Second, 1927 biography of Frederick II, Holy Roman Emperor, by Ernst Kantorowicz