Paul of Greece in the context of "Queen Sofía of Spain"

Constantine II (Greek: Κωνσταντίνος Βʹ, romanized: Konstantínos II, pronounced [ˌkonsta(n)ˈdinos o ˈðefteros]; 2 June 1940 – 10 January 2023) was the last King of Greece, reigning from 6 March 1964 until the abolition of the Greek monarchy on 1 June 1973.

Constantine was born in Athens as the only son of Crown Prince Paul and Crown Princess Frederica of Greece. Being of Danish descent, he was also born as a prince of Denmark. As his family was forced into exile during the Second World War, he spent the first years of his childhood in Egypt and South Africa. He returned to Greece with his family in 1946 during the Greek Civil War. After Constantine's uncle, George II, died in 1947, Paul became the new king and Constantine the crown prince. As a young man, Constantine was a competitive sailor and Olympian, winning a gold medal in the 1960 Rome Olympics in the Dragon class along with Odysseus Eskitzoglou and George Zaimis in the yacht Nireus. From 1964, he served on the International Olympic Committee.

Frederica of Hanover (German: Friederike Luise; Greek: Φρειδερίκη Λουΐζα, romanized: Phreideríkē Louḯza; 18 April 1917 – 6 February 1981) was Queen of Greece from 1 April 1947 until 6 March 1964 as the wife of King Paul and the Queen Mother of Greece from 6 March 1964, when her son Constantine II became King, until 8 December 1974, when the monarchy was officially abolished after a referendum.

Granddaughter of Kaiser Wilhelm II and daughter of Duke Ernest Augustus of Brunswick, Frederica was born a few months before the fall of the German Empire. Her family overthrown, she grew up between Austria and Weimar Germany, where her father owned large properties. As a teenager, she joined the Hitler Youth in 1933, before leaving to complete her studies for the next two years in the United Kingdom and then Italy. In Florence, she was received by Princess Helen of Greece and Denmark, at whose house she met the Crown Prince of Greece, Paul. The two fell in love and married two years after the restoration of the monarchy in Greece. In the years that followed, she gave birth to three children, Sophia in 1938, Constantine in 1940 and Irene in 1942.

Sofía (Sophia Margarita Victoria Frederica; Greek: Σοφία Μαργαρίτα Βικτωρία Φρειδερίκη, romanized: Sofía Margaríta Victoría Freideríki; born 2 November 1938) is a member of the Spanish royal family who was Queen of Spain from 1975 to 2014 as the wife of King Juan Carlos I until his abdication. She is the eldest child of King Paul and Queen Frederica of Greece.

Sofía married then Infante Juan Carlos of Spain in 1962 and became queen of Spain upon her husband's accession in 1975. On 19 June 2014, Juan Carlos abdicated in favour of their son Felipe VI. Since her spouse's abdication, Doña Sofía has usually been referred to as reina emérita ('queen emerita') by the press.

Konstantinos G. Karamanlis (Greek: Κωνσταντίνος Γ. Καραμανλής, pronounced [konstaˈdinos karamanˈlis]; 8 March 1907 – 23 April 1998) was a Greek statesman who was the four-time Prime Minister of Greece and two-term president of the Third Hellenic Republic, serving in the former role from 1955 to 1963 and from 1974 to 1980. A towering figure of Greek politics, his political career spanned portions of seven decades, covering much of the latter half of the 20th century.

Born near Serres in Macedonia, Karamanlis practiced law until his election to the Hellenic Parliament in 1936 as a member of the conservative People's Party. Rising through the ranks of Greek politics after World War II, Karamanlis became Minister of Labour in 1947, and in 1951 he was named Minister for Public Works in Alexandros Papagos's Greek Rally administration. He was appointed prime minister by King Paul of Greece after Papagos's death in 1955. During his first term, he applied a program of rapid industrialization, heavy investment on infrastructure and improvement on agricultural production, which led to the post-war Greek economic miracle. He also implemented the extension of full voting rights to women, which had stood dormant since 1952. In foreign affairs, he pursued an aggressive policy toward Greek membership in the European Economic Community (EEC), and abandoned the government's previous strategic goal for enosis (the unification of Greece and Cyprus) in favour of Cypriot independence. Re-elected three times, electoral victories in 1956 and 1961 were marred by controversy and political division.

Princess Irene of Greece and Denmark R.E. (Greek: Ειρήνη, romanized: Iríni; born 11 May 1942) is the youngest child and second daughter of King Paul of the Hellenes and his wife, Queen Frederica. She is the younger sister of Queen Sofía of Spain and the late King Constantine II of the Hellenes. She is also the great-granddaughter of Wilhelm II, German Emperor, who was the first grandson of Queen Victoria.