George I of Greece in the context of "King of Greece"

The Kingdom of Greece was ruled by the House of Wittelsbach from 1832 to 1862 and by the House of Glücksburg from 1863 to 1924 and, after being temporarily abolished in favor of the Second Hellenic Republic, again from 1935 to 1973, when it was once more abolished and replaced by the Third Hellenic Republic.

Only the first King, Otto, was actually styled King of Greece (Greek: Βασιλεὺς τῆς Ἑλλάδος). His successor, George I, was styled King of the Hellenes (Greek: Βασιλεὺς τῶν Ἑλλήνων), as were all other modern Greek monarchs.

The United States of the Ionian Islands was a Greek state and amical protectorate of the United Kingdom between 1815 and 1864. The successor state of the Septinsular Republic, it covered the territory of the Ionian Islands, as well as the port of Parga on the Greek mainland. It was ceded by the British to Greece as a gift to the newly enthroned King George I, apart from Parga, which had been sold to Ali Pasha of Ioannina in 1819.

Princess Marina of Greece and Denmark (Greek: Μαρίνα; 13 December [O.S. 30 November] 1906 – 27 August 1968), later Duchess of Kent, was a Greek and Danish princess by birth and a British princess by marriage. A granddaughter of King George I of Greece and Queen Olga, she was the daughter of Prince Nicholas of Greece and Denmark and Grand Duchess Elena Vladimirovna of Russia. In 1934, she married Prince George, Duke of Kent, the fourth son of King George V and Queen Mary. They had three children: Prince Edward, Princess Alexandra, and Prince Michael. She was widowed in 1942, when her husband was killed in a plane crash while on active service, and remained active in royal duties throughout her later life, attending public engagements across the Commonwealth, including the independence celebrations for Ghana and Botswana. She died in 1968, aged 61.

Alexandra of Denmark (Alexandra Caroline Marie Charlotte Louise Julia; 1 December 1844 – 20 November 1925) was Queen of the United Kingdom and the British Dominions, and Empress of India, from 22 January 1901 to 6 May 1910 as the wife of King Edward VII.

Alexandra's family had been relatively obscure until 1852, when her father, Prince Christian of Schleswig-Holstein-Sonderburg-Glücksburg, was chosen (with the consent of the major European powers) to succeed his second cousin Frederick VII as King of Denmark. At the age of 16, she was chosen as the future wife of Albert Edward, Prince of Wales, the son and heir apparent of Queen Victoria. The couple married 18 months later in 1863, the year in which her father became king of Denmark as Christian IX and her brother William was appointed king of Greece as George I.

The Greek royal family (Greek: Βασιλική Οικογένεια της Ελλάδος) was the ruling family of the Kingdom of Greece from 1863 to 1924 and again from 1935 to 1973. The Greek royal family is a branch of the Danish royal family, itself a cadet branch of the House of Glücksburg. The family had replaced the House of Wittelsbach that previously ruled Greece from 1832 to 1862. The first monarch was George I of Greece, the second son of King Christian IX of Denmark. The current head of the family is former Crown Prince Pavlos, who assumed the role on 10 January 2023 upon the death of his father, former King Constantine II.

With the 1974 Greek republic referendum and Article 4 of the Constitution of Greece, all family members have been stripped of their honorific titles and the associated royal status. Many family members born after 1974 still use the titles "Prince of Greece" and "Princess of Greece" to describe themselves, but such descriptions are neither conferred nor legally recognised by the Greek state as royal or noble titles. The family accepts that these terms are not royal titles, but rather personal identifiers.

Constantine I (Greek: Κωνσταντίνος Αʹ, romanized: Konstantínos I; 2 August [O.S. 21 July] 1868 – 11 January 1923) was King of Greece from 18 March 1913 to 11 June 1917 and again from 19 December 1920 to 27 September 1922. The eldest son of George I of Greece, he succeeded to the throne following his father's assassination in 1913.

Educated in Greece and later in Germany, Constantine was an admirer of Prussian militarism. As the crown prince, he was commander-in-chief of the Hellenic Army during the unsuccessful Greco-Turkish War of 1897. Later and under the leadership of Prime Minister Eleftherios Venizelos, he led successfully the Greek forces in the Balkan Wars of 1912–1913, in which Greece expanded, doubling in area and population.

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 Prince or Princess of Denmark.