Question: The following is a family tree for the Kings of the Hellenes of the House of Schleswig-Holstein-Sonderburg-Glücksburg, which ruled Greece between the election of Prince Wilhelm of Denmark (George I) to replace Otto of Greece in 1863, who was born Prince William of Schleswig-Holstein-Sonderburg-Glücksburg, on 24 December 1845, and was King of Greece from 1863 until his assassination in 1913?
Context: Princess Maria of Greece and Denmark (Greek: Πριγκίπισσα Μαρία της Ελλάδας και Δανίας ) (3 March 1876 – 14 December 1940) was the fifth child and second daughter of King George I of Greece and Olga Constantinovna of Russia, and thus a member of the House of Schleswig-Holstein-Sonderburg-Glücksburg.  She was later the king's only surviving daughter after the death of her older sister Grand Duchess Alexandra Georgievna of Russia in 1891. Princess Marie Alexandra of Schleswig-Holstein-Sonderburg-Glücksburg, since 1941 of Schleswig-Holstein (Marie Alexandra Caroline-Mathilde Viktoria Irene; 9 July 1927, Schloss Louisenlund, Schleswig, Schleswig-Holstein, Germany – 14 December 2000, Friedrichshafen, Baden-Württemberg, Germany) was a member of the House of Schleswig-Holstein-Sonderburg-Glücksburg.  Marie Alexandra was the fourth and youngest child of Wilhelm Friedrich, Duke of Schleswig-Holstein and his wife Princess Marie Melita of Hohenlohe-Langenburg.  Her older brother Peter was the Duke of Schleswig-Holstein and Head of the House of Oldenburg from 10 February 1965 until his death on 30 September 1980. The Greek royal family (Greek: Ελληνική Βασιλική Οικογένεια) is a branch of the House of Glücksburg that reigned in Greece from 1863 to 1924 and again from 1935 to 1973.  Its first monarch was George I, the second son of King Christian IX of Denmark.  He and his successors styled themselves "Kings of the Hellenes".  Most members of the dynasty (aside from the last king to reign, Constantine II and his queen consort, Anne-Marie of Denmark) hold the title "Prince or Princess of Greece and Denmark" with the style "Royal Highness", except Marina, Consort of Prince Michael, and their daughters Princess Alexandra and Princess Olga. Aristeidis Moraitinis (Greek: Αριστείδης Μωραïτίνης) (1806–1875) was born in Smyrna, Ottoman Empire (now İzmir, Turkey).  He was educated in France, but during the reign of King Otto, he was a staunch member of the French Party.  He served as the 15th Prime Minister of Greece for a few days in February 1863 during the period between the coup d'état against King Otto and the arrival of the new Danish-born Prince William who would be known in Greece as King George I.  Moraitinis was made Prime Minister a second time for a little over a month in 1868.  He died in Athens 1875. George I (Greek: Γεώργιος Α΄ , "Geórgios I"; born Prince William of Schleswig-Holstein-Sonderburg-Glücksburg; 24 December 1845 – 18 March 1913) was King of Greece from 1863 until his assassination in 1913. The following is a family tree for the Kings of the Hellenes of the House of Schleswig-Holstein-Sonderburg-Glücksburg, which ruled Greece between the election of Prince Wilhelm of Denmark (George I) to replace Otto of Greece in 1863 until the declaration of the Second Hellenic Republic in 1924, and again from 1935 until the abolition of the monarchy during the reign of King Constantine II in 1973.  Those who ruled Greece are given in bold capitals. Prince Andrew of Greece and Denmark (Greek: Ανδρέας ; 2 February 1882 (N.S.) – 3 December 1944) of the House of Schleswig-Holstein-Sonderburg-Glücksburg, was the seventh child and fourth son of King George I of Greece and Olga Constantinovna of Russia.  He was a grandson of Christian IX of Denmark and father of Prince Philip, Duke of Edinburgh. This is a list of Greek princes from the accession of George I of the House of Glücksburg to the throne of the Kingdom of Greece in 1863.  Individuals holding the title of prince will usually also be styled "His Royal Highness" (HRH).  The wife of a Greek prince will usually take the title and style of her husband.  Despite Greece becoming a republic in 1924 and 1973, male-line descendants of George I continue to style themselves as a Prince or Princess of Greece, as well as Princes or Princess of Denmark. Princess Louise Caroline of Hesse-Kassel (German: "Luise Karoline von Hessen-Kassel" ) (28 September 1789, Gottorp – 13 March 1867, Ballenstedt) was the consort of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and the matriarch of the House of Schleswig-Holstein-Sonderburg-Glücksburg, which would eventually become the ruling house of the kingdoms of Denmark, Greece, Norway, and, barring unforeseen circumstances, the United Kingdom. Grand Duchess Alexandra Georgievna of Russia (Russian: Алекса́ндра Гео́ргиевна ); "née" Princess Alexandra of Greece and Denmark (Greek: Πριγκίπισσα Αλεξάνδρα της Ελλάδας και της Δανίας ); 30 August 1870 – 24 September 1891) was the third child and firstborn daughter of King George I and Queen Olga of Greece, who herself was a daughter of a Russian grand duke, and was also a grandchild of Denmark's King Christian IX and Queen Louise.  She was a sister to Constantine I of Greece, and thus aunt of three kings and two queens, Constantine's three sons, who all became kings of Greece, and two of his daughters, who were queens, in name, of Romania and Croatia, respectively.  She was also first cousin of Tsar Nicholas II of Russia, King George V of the United Kingdom, and both King Haakon VII and Queen Maud of Norway, as well as a paternal aunt of Prince Philip, Duke of Edinburgh.
Answer: George I