Willi Herold (11 September 1925 – 14 November 1946), also known as the Executioner of Emsland, was a Nazi German war criminal. Near the end of the Second World War in Europe, Herold deserted from the Luftwaffe and, posing as a captain, organized the mass execution of German deserters held at a prison camp.

Marybeth Roe Tinning (born September 11, 1942) is an American murderer and suspected serial killer who was convicted in New York State of the murder of her ninth child, 4-month-old daughter Tami Lynne, on December 20, 1985. She is suspected to be similarly involved in the previous deaths of her eight children, all of which took place within the span of fourteen years.

Viktor Kalivoda (11 September 1977 – 26 September 2010) was a Czech police officer and spree killer who shot and murdered three people in a forest in Nedvědice over the span of three days October 2005, and was also known by the nickname, the Forest Killer.

Eric David Harris (April 9, 1981 – April 20, 1999) and Dylan Bennet Klebold ( KLEE-bohld; September 11, 1981 – April 20, 1999) were American high school seniors and a mass murderer duo who perpetrated the massacre at Columbine High School on April 20, 1999, in Columbine, Colorado. Harris and Klebold killed 13 students and one teacher and wounded 23 others.

Bashar Hafez al-Assad (born 11 September 1965) is a Syrian former politician, doctor, and military officer who served as the president of Syria from 2000 until his overthrow in 2024 after the Syrian civil war. As president, Assad was commander-in-chief of the Syrian Arab Armed Forces and secretary-general of the Central Command of the Arab Socialist Ba'ath Party.