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.