| Frederick VIII | |||||
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 | |||||
| Duke of Schleswig-Holstein | |||||
| Predecessor | Frederick VII | ||||
| Successor | Ernst Gunther | ||||
| Duke of Schleswig-Holstein-Sonderburg-Augustenburg | |||||
| Predecessor | Christian August II | ||||
| Successor | Ernst Gunther | ||||
| Born | 6 July 1829 Augustenburg, Schleswig, Denmark | ||||
| Died | 14 January 1880 (aged 50) Wiesbaden, Hesse-Nassau, Prussia, Germany | ||||
| Spouse | Princess Adelheid of Hohenlohe-Langenburg | ||||
| Issue more... | |||||
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| House | Schleswig-Holstein-Sonderburg-Augustenburg | ||||
| Father | Christian August II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg | ||||
| Mother | Countess Louise Sophie Danneskiold-Samsøe | ||||
Frederick VIII, Duke of Schleswig-Holstein and of Schleswig-Holstein-Sonderburg-Augustenburg (Danish: Frederik Christian August af Slesvig-Holsten-Sønderborg-Augustenborg; German: Friedrich Christian August Herzog von Schleswig-Holstein-Sonderburg-Augustenburg; 6 July 1829 – 14 January 1880) was the German pretender to the throne of second duke of Schleswig-Holstein from 1863, although in reality Prussia took overlordship and real administrative power.