Friedrich Ferdinand, Duke of Schleswig-Holstein
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.
John Adolphus, Duke of Schleswig-Holstein-Sonderburg-Plön
John Adolphus of Schleswig- Holstein- Sonderburg- Plön( or" Hans Adolf"; 8 April 1634, Ahrensbök – 2 July 1704 Ruhleben) was the second Duke of Schleswig- Holstein- Sonderburg- Plön, which had been created by a division of the Duchy of Schleswig- Holstein- Sonderburg.
Frederick VIII, Duke of Schleswig-Holstein
Duke Frederick VIII
(July 6, 1829 – January 14, 1880) was the German pretender to the throne of Schleswig-Holstein from 1863, although in reality Prussia took overlordship and real administrative power.
Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Alexandra Victoria of Schleswig-Holstein- Sonderburg- Glücksburg( 21 April 1887 – 15 April 1957) was a daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg.
Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg
Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg (25 January 1860, in Augustenborg, Jutland, Denmark – 20 February 1932, in Grünholz, Province of Schleswig-Holstein, Free State of Prussia, Weimar Republic) was the second-eldest daughter of Frederick VIII, Duke of Schleswig-Holstein and his wife Princess Adelheid of Hohenlohe-Langenburg.
Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Helena Adelaide of Schleswig-Holstein- Sonderburg- Glücksburg( 1 June 1888- 30 June 1962) was the third eldest daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg.
She was a princess of Denmark through her marriage within the House of Schleswig- Holstein- Sonderburg- Glücksburg to Prince Harald of Denmark.
Princess Helena was a Nazi sympathiser during World War II and was after the war exiled from Denmark, but eventually allowed to return, where she died.
Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Plön
Joachim Ernest of Schleswig-Holstein- Sonderburg- Plön( 29 August 1595 – October 5, 1671), also" Joachim Ernest of Schleswig- Holstein- Plön", was the first Duke of Schleswig- Holstein- Sonderburg- Plön, which emerged from a division of the Duchy of Schleswig- Holstein- Sonderburg.
Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Glücksburg( Viktoria- Irene Adelheid Auguste Alberta Feodora Karoline Mathilde of Schleswig -Holstein- Sonderburg- Glücksburg; 11 May 1894 – 28 January 1972) was a member of the House of Schleswig- Holstein- Sonderburg- Glücksburg and Princess of Schleswig- Holstein- Sonderburg- Glücksburg by birth and a member of the House of Solms Baruth and Countess of Solms Baruth through her marriage to Count Hans of Solms- Baruth.
Prince Frederick of Schleswig-Holstein-Sonderburg-Augustenburg
Prince Frederick Emil August of Schleswig-Holstein- Sonderburg- Augustenburg( Kiel, 23 August 1800 – Bayreuth, Germany, 2 July 1865), usually simply known by just his first name, Frederick," Prince of Noer", was a prince of the House of Schleswig- Holstein- Sonderburg- Augustenburg and a cadet- line descendant of the Danish royal house.
He was the second and youngest son of Louise Auguste of Denmark and Frederik Christian II, Duke of Schleswig- Holstein- Sonderburg- Augustenburg.
As such, he was close to succeed in the Danish throne.
He was the brother- in- law of King Christian VIII and nephew of King Frederik VI.
His elder brother, Christian August II, succeeded in 1814 as the Duke of Schleswig- Holstein- Sonderburg- Augustenburg.
After his second, morganatic union, he renounced the rights of succession to House of Augustenburg.
He was created Prince of Noer or Nør by Emperor Franz Joseph of Austria afterwards.
Prince Frederick died 1865 at Bayreuth.
Princess Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg
Princess" Adelaide" Louise of Schleswig- Holstein- Sonderburg- Glücksburg( 19 October 1889 – 11 June 1964) was a daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg.
Princess Adelaide was the Princess consort of Solms- Baruth through her marriage to Friedrich, 3rd Prince of Solms- Baruth.

Question: What nationality is Princess Karoline Mathilde Of Schleswig-Holstein-Sonderburg-Augustenburg's father?
Answer: German