Ibrahim Awwad Ibrahim Ali al-Badri (28 July 1971 – 27 October 2019), commonly known by his nom de guerre Abu Bakr al-Baghdadi, was an Iraqi militant leader and former teacher who was the founder and first leader of the Islamic State (IS), who proclaimed himself caliph in 2014 and stayed in power until his suicide in an American operation in 2019.

Béla Kiss (; Hungarian: [ˈbeːlɒ ˈkiʃ]; c. 1877 – after 4 October 1916) was a Hungarian serial killer.

Nathaniel White (born July 28, 1960) is an American serial killer. Active in the Hudson Valley region, in and near Orange County, New York, during the early 1990s, White confessed to beating and stabbing six women to death while on parole.

Denis Alekseevich Gorbunov (Russian: Денис Алексеевич Горбунов; 28 July 1977 – 26 March 2006), known as The Ad Killer (Russian: Убийца по объявлению), was a Russian serial killer who murdered five women during robberies in Chelyabinsk from December 2004 to May 2005. Convicted and sentenced to life imprisonment for his crimes, he killed himself two days after his conviction.

Robert Earnest Rozier Jr. (born July 28, 1955) is an American murderer and former professional defensive end in gridiron football.