Notable Deaths on June 27

Georgios Papadopoulos was a Hellenic Army officer and military dictator who ruled Greece from 1967 to 1973. He led the military junta that overthrew Prime Minister Panagiotis Kanellopoulos in 1967 and established his dictatorship. He was proclaimed Prime Minister of Greece from 1967 and served until 1973. He was elected President of Greece under the junta in June 1973, following a referendum. However, after causing a massacre by deploying military riflemen and a tank brigade to attack non-violent protestors to suppress the Athens Polytechnic uprising, he was overthrown by hardliner Dimitrios Ioannidis, in a string of events that would culminate in the fall of regime in 1974. His and dictatorship's legacy, as well as its methods he constructed and effects on Greek economy and society as a whole, are still fiercely debated.

Konstantin Pavlovich was a grand duke of Russia and the second son of Emperor Paul I and Sophie Dorothea of Württemberg. He was the heir presumptive for most of his elder brother Alexander I's reign, but had secretly renounced his claim to the throne in 1823. For 25 days after the death of Alexander I; from 19 November (O.S.)/1 December to 14 December (O.S.)/26 December 1825, he was known as His Imperial Majesty Konstantin I Emperor and Sovereign of Russia, although he never reigned and never acceded to the throne. His younger brother Nicholas became tsar in 1825. The succession controversy became the pretext of the Decembrist revolt.

Alfonso the Magnanimous was King of Aragon and King of Sicily and the ruler of the Crown of Aragon from 1416 and King of Naples from 1442 until his death. He was involved with struggles to the throne of the Kingdom of Naples with Louis III of Anjou, Joanna II of Naples and their supporters, but ultimately failed and lost Naples in 1424. He recaptured it in 1442 and was crowned king of Naples. He had good relations with his vassal, Stjepan Kosača, and his ally, Skanderbeg, providing assistance in their struggles in the Balkans. He led diplomatic contacts with the Ethiopian Empire and was a prominent political figure of the early Renaissance, being a supporter of literature as well as commissioning several constructions for the Castel Nuovo.

Marie-Sophie Germain was a French mathematician, physicist, and philosopher. Despite initial opposition from her parents and difficulties presented by society, she gained education from books in her father's library, including ones by Euler, and from correspondence under the pseudonym of Monsieur Le Blanc with famous mathematicians, such as Lagrange, Legendre, and Gauss. One of the pioneers of elasticity theory, she won the grand prize from the Paris Academy of Sciences for her essay on the subject. Her work on Fermat's Last Theorem provided a foundation for mathematicians exploring the subject for hundreds of years after. Because of prejudice against her sex, she was unable to make a career out of mathematics, but she worked independently throughout her life. Before her death, Gauss had recommended that she be awarded an honorary degree, but that never happened. On 27 June 1831, she died from breast cancer. Following the publication of a biography in the late 1870s marking the centenary of her life, a street and a girls' school were named after her. The Academy of Sciences established the Sophie Germain Prize in her honour.

Harry Pollitt was a British communist who served as the General Secretary of the Communist Party of Great Britain (CPGB) from July 1929 to September 1939 and again from 1941 until his death in 1960. Pollitt spent most of his life advocating communism. Ideologically a Marxist–Leninist, Pollitt was an adherent particularly of Joseph Stalin even after Stalin's death and rise of Nikita Khrushchev. Pollitt's acts included opposition to the Allied intervention in the Russian Civil War and Polish–Soviet War, support for the Spanish Republicans during the Spanish Civil War, both support for and opposition to the war against Nazi Germany, defence of the communist coup in Czechoslovakia, and support for the 1956 Soviet invasion of Hungary.

Leutnant Karl Allmenröder was a German World War I flying ace credited with 30 aerial victories. The medical student son of a preacher father was seasoned in the trenches as an 18-year-old artilleryman in the early days of the First World War, earning promotion via battlefield commission to Leutnant on 30 March 1915. After transferring to aviation and serving some time as an artillery spotter in two-seater reconnaissance airplanes, he transferred to flying fighter aircraft with Jagdstaffel 11 in November 1916. As Manfred von Richthofen's protege, Karl Allmenröder scored the first of his 30 confirmed victories on 16 February 1917. Flying a scarlet Albatros D.III trimmed out with white nose and elevators, Allmenröder would score a constant string of aerial victories until 26 June 1917, the day before his death. On 27 June 1917, Karl Allmenröder was shot down near Zillebeke, Belgium. His posthumous legacy of patriotic courage would later be abused as propaganda by the Nazis.

Wanda Hazel Gág was an American artist, author, translator, and illustrator. She is best known for writing and illustrating the children's book Millions of Cats, the oldest American picture book still in print. Gág was also a noted print-maker, receiving international recognition and awards. Growing Pains, a book of excerpts from the diaries of her teen and young adult years, received widespread critical acclaim. Two of her books were awarded Newbery Honors and two received Caldecott Honors. The New York Public Library included Millions of Cats on its 2013 list of 100 Great Children's Books.

Élisabeth Claude Jacquet de La Guerre was a French musician, harpsichordist and composer. Jacquet de La Guerre was a significant figure in French Baroque music, particularly in the development of cantata and keyboard traditions. She was one of the earliest women in France to achieve recognition as a composer and to have her works widely performed and published. She was among the first French composers to write cantatas, helping establish the genre in France. She was closely associated with the court of Louis XIV, where her career was shaped by royal patronage and the musical culture of Versailles. Her music blends French stylistic traditions with elements of Italian influence, particularly in her vocal and instrumental works.

Harold Segerson Mahony was a Scottish-born Irish tennis player who is best known for winning the singles title at the Wimbledon Championships in 1896. His career lasted from 1888 until his death in 1905. Mahony was born in Scotland but lived in Ireland for the majority of his life; his family were Irish including both of his parents, the family home was in County Kerry, Southwestern Ireland. He was the last Scottish born man to win Wimbledon until the victory of Andy Murray at the 2013 championships. He remains the most recent Irish singles champion at the All England Club.

Francis Sydney Smythe, better known as Frank Smythe or F. S. Smythe, was an English mountaineer, author, photographer and botanist. He is best remembered for his mountaineering in the Alps as well as in the Himalayas, where he identified a region that he named the "Valley of Flowers", now a protected park. His ascents include two new routes on the Brenva Face of Mont Blanc, Kamet, and attempts on Kangchenjunga and Mount Everest in the 1930s. It was said that he had a tendency for irascibility, something some of his mountaineering contemporaries said "decreased with altitude".

George Nēpia was a New Zealand Māori rugby union and rugby league player. He is remembered as an exceptional full-back and one of the most famous Māori rugby players. He was inducted into the New Zealand Sports Hall of Fame in 1990. In 2004 he was selected as number 65 by the panel of the New Zealand's Top 100 History Makers television show. Nēpia was featured in a set of postage stamps from the New Zealand post office in 1990. Historian Philippa Mein Smith described him as "New Zealand rugby's first superstar".

Tove Marika Jansson was a Finland-Swedish author, novelist and comic strip author, painter and illustrator. Brought up by artistic parents, her mother an illustrator and postage stamp designer, her father a sculptor, Jansson studied art from 1930 to 1938 in Helsinki, Stockholm, and Paris. She held her first solo art exhibition in 1943. Over the same period, she penned short stories and articles for publication, and subsequently drew illustrations for book covers, advertisements, and postcards. She continued her work as an artist and writer for the rest of her life.

John Uhler Lemmon III was an American actor. Considered proficient in both dramatic and comic roles, he was known for his anxious, middle-class everyman screen persona in comedy-drama films. He received numerous accolades including two Academy Awards, five Golden Globe Awards, three BAFTA Awards, two Primetime Emmy Awards and one Volpi Cup. He also received the AFI Life Achievement Award in 1988, the Cecil B. DeMille Award in 1991, and the Kennedy Center Honors in 1996. The Guardian labeled him as "the most successful tragi-comedian of his age".

Floris V reigned as Count of Holland and Zeeland from 1256 until 1296. His life was documented in detail in the Rijmkroniek by Melis Stoke, his chronicler. He is credited with a mostly peaceful reign, modernizing administration, policies beneficial to trade, generally acting in the interests of his peasants at the expense of nobility, and reclaiming land from the sea. His dramatic murder, said by some to have been arranged by King Edward I of England and Guy, Count of Flanders, made him a hero in Holland.

Ida Mett (1901–1973) was a Belarusian anarcho-syndicalist, physician and writer. Following her experiences in the Russian Revolution, she fled into exile in France, where she collaborated with other exiled revolutionary anarchists on the Delo truda magazine and the constitution of platformism. She then went on to participate in the anarcho-syndicalist movements in Belgium, Spain and France, before repression by the fascist Vichy regime forced her to cease her activities. She spent the final decades of her life working as a nurse and publishing history books.

Date Masamune was a Japanese samurai and daimyō during the Azuchi–Momoyama period through the early Edo period. Heir to a long line of powerful feudal lords in the Tōhoku region, he went on to found the modern-day city of Sendai. An outstanding tactician, he was made all the more iconic for his missing eye, as Masamune was often called dokuganryū (独眼竜), or the "One-Eyed Dragon of Ōshū". As a legendary warrior and leader, Masamune is a character in a number of Japanese period dramas.

Martin Eugene Mull was an American actor, musician, and painter. He became known on Mary Hartman, Mary Hartman, then its spin-off Fernwood 2 Night, and America 2 Night. His other notable roles included Colonel Mustard in the 1985 film Clue, Leon Carp on Roseanne, Willard Kraft on Sabrina the Teenage Witch, Vlad Masters/Vlad Plasmius on Danny Phantom, and Gene Parmesan on Arrested Development. He also had a recurring role on Two and a Half Men as Russell, a drug-using humorous pharmacist.

Joseph Smith Jr. was an American religious and political leader and the founder of Mormonism and the Latter Day Saint movement. Publishing the Book of Mormon at the age of 24, Smith attracted tens of thousands of followers by the time of his death fourteen years later. The religious movement he founded is followed by millions of global adherents and several churches, the largest of which is the Church of Jesus Christ of Latter-day Saints.

John Alec Entwistle was an English singer, songwriter, musician, composer and record producer, best known as the bass guitarist for the rock band the Who. Entwistle's music career spanned over four decades. Nicknamed "The Ox" and "Thunderfingers", he was the band's only member with formal musical training and also provided backing and occasional lead vocals. Entwistle was inducted into the Rock and Roll Hall of Fame as a member of the Who in 1990.