Frederick Christian II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg (d. 1814)

Frederick Christian II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg (28 September 1765 in Augustenburg – 14 June 1814 in Augustenburg) was a Danish prince and feudal magnate. He held the island of Als and some other castles (such as Sonderborg) in Schleswig.