He was the eldest son of Christian August II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg and Countess Louise Sophie of Danneskiold-Samsøe. He was ethnically perhaps the most Danish Prince of the Danish Royal dynasty in his generation (at the time of Denmark's most recent succession crisis).
Frederick VIII(Danish: Christian Frederik Vilhelm Carl; 3 June 1843 – 14 May 1912) was King of Denmarkfrom 1906 to 1912. Before his accession to the throne at age 62, he served as crown princefor over 42 years. During the long reign of his father, King Christian IX, he was largely excluded from influence and political power.
He was the eldest son of Christian August II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg and Countess Louise Sophie of Danneskiold-Samsøe.
Duke Frederick VIII (_de. Friedrich Herzog von Schleswig-Holstein-Sonderburg-Augustenburg; July 6, 1829 - January 14, 1880), claimed to be the Duke of Schleswig-Holstein from 1863, though almost nominally, as Prussia actually took overlordship and real administrative power.
Duke Frederick VIII (Danish: Frederik Christian August af Slesvig-Holsten-Sønderborg-Augustenborg; German: Friedrich Herzog von Schleswig-Holstein-Sonderburg-Augustenburg) was the German pretender to the throne of Schleswig-Holstein from 1863, although in reality Prussia took overlordship and real administrative power.
Frederick Christian Augustus Schleswig-Holstein-Sonderburg-Augustenburg VIII Age. 50. Born. Monday 06 Jul 1829. Died. 14 Jan 1880
He was from the Schleswig-Holstein-Sonderburg-Glücksburg branch of the Oldenburgs. Also King of Denmark . In 1864 the duchy was annexed to the Kingdom of Prussia .
In the course of history, the County of Holstein was several times partitioned among the inheriting sons into up to six lines. In 1386 King Oluf II of Denmark and his mother-regent, Queen Margaret I, enfeoffed in Nyborg Gerhard VI, Count of Holstein-Rendsborg and his cognatic successors with the Duchy of Schleswig, which had been in the royal family's hands until 1375.
Friedrich Ferdinand of Schleswig-Holstein-Sonderburg-Glücksburg (12 October 1855 – 21 January 1934) was the fourth Duke of Schleswig-Holstein-Sonderburg-Glücksburg and became Duke of Schleswig-Holstein in 1931.