Orville Lynn Majors (April 24, 1961 – September 24, 2017) was a licensed practical nurse and serial killer who was convicted of murdering his patients in Clinton, Indiana. Though he was tried for only seven murders and convicted of six, he was believed to have caused additional deaths between 1993 and 1995, when he was employed by the hospital at which the deaths occurred and for which he was investigated.

Steven Dennis "Clem" Grogan (born July 13, 1951) is an American convicted murderer and former member of the Manson Family. He was released from prison in 1985.

Eamonn Casey (24 April 1927 – 13 March 2017) was an Irish Catholic priest who served as bishop of Galway and Kilmacduagh in Ireland from 1976 to 1992. He was appointed Chairman of Trócaire following the organisation’s establishment in 1973, where he shone a spotlight on situations of injustice overseas, particularly in El Salvador, South Africa, Mozambique, Uganda, Malawi and the Philippines.

Andrea Matteucci (born 24 April 1962), known as The Monster of Aosta (Il mostro di Aosta, in Italian), is an Italian criminal and serial killer who committed four murders in the 1980s and 1990s. He is the only Aosta Valley serial killer.

Steven Gerald James Wright (born 24 April 1958) is an English serial killer, also known as the Suffolk Strangler. He is currently serving life imprisonment for the murder of five women who worked in Ipswich, Suffolk, in 2006.

Michael Hans Lippert (24 April 1897 – 1 September 1969) was a mid-level paramilitary commander in the Waffen-SS of Nazi Germany during World War II. He commanded several concentration camps, including Sachsenhausen, before becoming a commander of the SS-Freiwilligen Legion Flandern and the SS Division Frundsberg.

Manuel José Estrada Cabrera (21 November 1857 – 24 September 1924) was the President of Guatemala from 1898 to 1920. A lawyer with no military background, he modernised the country's industry and transportation infrastructure, via granting concessions to the American-owned United Fruit Company, whose influence on the government was deeply unpopular among the population.

Paul John Knowles (April 25, 1946 – December 18, 1974), also known as The Casanova Killer, was an American serial killer tied to the deaths of 18 people in 1974, although he claimed at least 35.

Tamara Mitrofanovna Samsonova (Russian: Тама́ра Митрофа́новна Самсо́нова; born 25 April 1947), known as Granny Ripper and Baba Yaga, is a Russian murderer and suspected serial killer who was arrested in July 2015. She has been hospitalized three times in psychiatric hospitals and may be schizophrenic.

Oliver Cromwell (25 April 1599 – 3 September 1658) was an English statesman, farmer and soldier, widely regarded as one of the most important figures in British history. He came to prominence during the Wars of the Three Kingdoms, initially as a senior commander in the Parliamentarian army and later as a politician.

Samson Isberg (26 April 1795 – 25 May 1873) was a Norwegian executioner. He served as Norway's official executioner from 1849 to 1868.

Matteo Messina Denaro (Italian pronunciation: [matˈtɛːo mesˈsiːna deˈnaːro]; 26 April 1962 – 25 September 2023), also known as Diabolik (from the Italian comic book character), was an Italian mafia boss from Castelvetrano. He was considered to be one of the new leaders of the Cosa Nostra after the arrests of Bernardo Provenzano on 11 April 2006 and Salvatore Lo Piccolo in November 2007.

William "Willie the Rat" Dominick Cammisano Sr. (April 26, 1914 – January 26, 1995) was an American mobster and enforcer for Nicholas Civella's Kansas City crime family.

Rudolf Walter Richard Hess (Heß in German; 26 April 1894 – 17 August 1987) was a German politician, convicted war criminal, and a leading member of the Nazi Party in Germany. Appointed Deputy to the Führer (Stellvertreter des Führers) in 1933, Hess held that position until 1941, when he flew solo to Scotland in an attempt to negotiate the United Kingdom's exit from the Second World War.

Vice-Admiral of the Blue William Bligh (9 September 1754 – 7 December 1817) was a Royal Navy officer and colonial administrator who served as the governor of New South Wales from 1806 to 1808. He is best known for his role in the mutiny on HMS Bounty, which occurred in 1789 when the ship was under his command.

Daisuke Mori (守 大助, Mori Daisuke; born April 28, 1971) is a Japanese nurse, who was convicted for giving lethal doses of the muscle relaxant drug vecuronium to his patients in a clinic in Izumi-ku, Sendai, Miyagi Prefecture. Although he was convicted of only one murder, he is suspected to be a medical serial killer.

Futoshi Matsunaga (松永 太, Matsunaga Futoshi; born April 28, 1961) is a Japanese serial killer who both defrauded and tortured his victims in what is collectively known as the Kitakyūshū Serial Murder Incident (北九州連続殺人事件). Matsunaga was convicted of six counts of murder and one count of manslaughter between 1996 and 1998 and sentenced to death.

José María Jarabo (28 April 1923 – 4 July 1959) was a Spanish spree killer, who between 19 and 21 July 1958, murdered four adults and an unborn baby. Jarabo was sentenced to death by garrote and executed in 1959.

Anthony Joseph Accardo (; born Antonino Leonardo Accardo, Italian: [antoˈniːno leoˈnardo akˈkardo]; April 28, 1906 – May 22, 1992), also known as "Joe Batters" and "Big Tuna," was a mobster in the American Mafia. In a criminal career that spanned nearly eight decades, Accardo rose from small-time hoodlum to the position of day-to-day boss of the Chicago Outfit in 1947, to ultimately becoming the power behind the throne in the Outfit by 1972.

Saddam Hussein (28 April 1937 – 30 December 2006) was an Iraqi politician and revolutionary who served as the fifth president of Iraq from 1979 until his overthrow in 2003 during the United States-led invasion of Iraq. He previously served as the vice president from 1968 to 1979 and also as the prime minister from 1979 to 1991 and later from 1994 to 2003.

Yoshitomo Hori (Japanese: 堀 慶末; né Kim; born April 29, 1975) is a Korean-Japanese serial killer who killed a couple in Hekinan in 1998, and later participated in the murder of Rie Isogai in 2007. Sentenced to life imprisonment for the latter crime, he was linked to the double murder and another attempted murder in 2012, for which he was sentenced to death and currently awaits execution on death row.

Johann Reichhart (29 April 1893 – 26 April 1972) was a German state-appointed judicial executioner in Bavaria from 1924 to 1946. During the Nazi period, he executed numerous people who were sentenced to death for their resistance to the German government.

August Hirt (28 April 1898 – 2 June 1945) was an anatomist with Swiss and German nationality who served as a chairman at the Reich University in Strasbourg during World War II. He performed experiments with mustard gas on inmates at the Natzweiler-Struthof concentration camp and played a leading role in the murders of 86 people at Natzweiler-Struthof for the Jewish skull collection.

Vito Badalamenti (Italian pronunciation: [ˈviːto badalaˈmenti]; born 29 April 1957) is a member of the Sicilian Mafia. He was on the "Italy's most wanted list" from 1995 until 2012 when the statute of limitations was declared expired.

Emperor Shōwa (昭和天皇, Shōwa Tennō; 29 April 1901 – 7 January 1989), known colloquially by his personal name Hirohito, was the 124th emperor of Japan according to the traditional order of succession, reigning from 1926 until his death in 1989. He remains the longest-reigning emperor in Japanese history and one of the longest-reigning monarchs in the world.

Oleg Vladimirovich Kuznetsov (Russian: Оле́г Влади́мирович Кузнецо́в; 30 April 1969 – 4 August 2000), known as The Balashikha Ripper (Russian: Балашихинский Джек-потрошитель), was a Soviet-Russian serial killer and rapist. Between 1991 and 1992, he killed 10 girls and women between the ages of 15 and 30.

Ulrich Friedrich-Wilhelm Joachim von Ribbentrop (German: [joˈʔaxɪm fɔn ˈʁɪbəntʁɔp]; 30 April 1893 – 16 October 1946) was a German politician, diplomat, and war criminal who served as Minister of Foreign Affairs of Nazi Germany from 1938 to 1945.