Question: Who is the father-in-law of Princess Louise Of Schleswig-Holstein-Sonderburg-Glücksburg?

Knowledge 1: Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg (6 January 1858 in Schloss Luisenlund, Kiel, Duchy of Schleswig – 2 July 1936 in Marburg an der Lahn, Hesse, Germany) was the princess consort of George Victor, Prince of Waldeck and Pyrmont.Louise was the third child and second eldest daughter of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Adelheid of Schaumburg-Lippe and a niece of Christian IX of Denmark. [SEP] Knowledge 2: George Victor, Prince of Waldeck and Pyrmont
George Victor (14 January 1831 – 12 May 1893) was the 3rd sovereign Prince of the German state of Waldeck and Pyrmont.He was born in Arolsen the son of George II, Prince of Waldeck and Pyrmont and his wife Princess Emma of Anhalt-Bernburg-Schaumburg-Hoym.He succeeded as prince originally under the guardianship of his mother on 15 May 1845 following the death of his father.He died of pneumonia in Marienbad, Bohemia and was succeeded by his eldest son Friedrich.
Knowledge 1: Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg (6 January 1858 in Schloss Luisenlund, Kiel, Duchy of Schleswig – 2 July 1936 in Marburg an der Lahn, Hesse, Germany) was the princess consort of George Victor, Prince of Waldeck and Pyrmont.Louise was the third child and second eldest daughter of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Adelheid of Schaumburg-Lippe and a niece of Christian IX of Denmark. [SEP] Knowledge 2: Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg (4 January 1785 – 17 February 1831) inherited the title of Duke of Schleswig-Holstein-Sonderburg-Beck in 1816.He subsequently changed his title to Duke of Schleswig-Holstein-Sonderburg-Glücksburg in 1825 and founded a line that includes the Royal Houses of Denmark, Greece, Norway, and the Commonwealth realms.
Knowledge 1: Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg (6 January 1858 in Schloss Luisenlund, Kiel, Duchy of Schleswig – 2 July 1936 in Marburg an der Lahn, Hesse, Germany) was the princess consort of George Victor, Prince of Waldeck and Pyrmont.Louise was the third child and second eldest daughter of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Adelheid of Schaumburg-Lippe and a niece of Christian IX of Denmark. [SEP] Knowledge 2: Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Friedrich of Schleswig- Holstein- Sonderburg- Glücksburg( 23 October 1814 in Schleswig, Duchy of Schleswig – 27 November 1885 in Luisenlund, Schleswig- Holstein, Prussia) was the third Duke of Schleswig- Holstein- Sonderburg- Glücksburg.Friedrich was the second- eldest son of Friedrich Wilhelm, Duke of Schleswig- Holstein- Sonderburg- Glücksburg and Princess Louise Caroline of Hesse- Kassel and an elder brother of Christian IX of Denmark.Friedrich inherited the title of Duke of Schleswig- Holstein- Sonderburg- Glücksburg upon his childless brother Karl's death on 14 October 1878.

Answer: George II