Howard Barton Unruh (January 21, 1921 – October 19, 2009) was an American mass murderer who shot and killed thirteen people and injured three others during a twelve-minute walk through a one-block span of his neighborhood in Camden, New Jersey, on September 6, 1949. The incident, which became known as the "Walk of Death" and the "Camden shootings", ended after Unruh surrendered to police after running out of ammunition.

John Bodkin Adams (21 January 1899 – 4 July 1983) was a British general practitioner, convicted fraudster, and suspected serial killer. Between 1946 and 1956, 163 of his patients died while in comas, which was deemed to be worthy of investigation.

Alfred Griner Packer (January 21, 1842 – April 23, 1907), also known as the "Colorado Cannibal", was an American prospector and self-proclaimed wilderness guide who confessed to cannibalism during the winter of 1874. Though no clear or definitive evidence has been found to this day, and despite in-depth research about proof of his deeds, he is one of the four persons historically convicted for cannibalism in the United States.

Gowri Shankar (21 January 1954 – 27 April 1995), better known as 'Auto' Shankar, was an Indian criminal, murderer and gangster from Tamil Nadu, who was active in Chennai throughout the 1970s and 1980s.

Cody Alan Legebokoff (born 21 January 1990) is a Canadian serial killer convicted in 2014 by the Supreme Court of British Columbia of murdering three women and one teenage girl, between 2009 and 2010, in or near the city of Prince George, British Columbia. He is one of Canada's youngest convicted serial killers, and his trial drew national attention.

Alfredo Beltrán Leyva (born January 21, 1971), commonly referred to by his alias El Mochomo (The Desert Ant), is a Mexican convicted drug lord and former leader of the Beltrán-Leyva Cartel, a drug trafficking organization. He was one of Mexico's most-wanted drug lords.

Thomas Jonathan "Stonewall" Jackson (January 21, 1824 – May 10, 1863) was a Confederate general and military officer who served during the American Civil War. He played a prominent role in nearly all military engagements in the eastern theater of the war until his death.