Leonarda Cianciulli (14 April 1894 – 15 October 1970) was an Italian serial killer. Better known as the Soap-Maker of Correggio (Italian: la Saponificatrice di Correggio), she murdered three women in the town of Correggio, Reggio Emilia, in 1939 and 1940, and turned their bodies into soap (using caustic soda) and teacakes.

Bruce Delane Mendenhall (born April 14, 1951) is a convicted American serial killer. He was arrested in Tennessee in July 2007 and found guilty in 2010 of the June 26, 2007 murder of Sara Hulbert.

Paul Charles Denyer (born 14 April 1972, known briefly as Paula whilst in prison) is an Australian serial killer currently serving three consecutive sentences of life imprisonment with a non-parole period of 30 years for the murders of three young women in Melbourne, in 1993. Denyer became known in the media as the Frankston Serial Killer as his crimes occurred in the neighbouring suburbs of Frankston.

François Duvalier (14 April 1907 – 21 April 1971), also known as Papa Doc, was a Haitian politician and physician who served as president of Haiti from 1957 until his death in 1971.