Poisoners

duke of Milan

American cult leader (1931–1978)

American con artist and serial killer (1861–1896)

English doctor and serial killer (1947-2004)

Claudia Livia (Classical Latin: CLAVDIA•LIVIA; – AD 31) was the only daughter of Nero Claudius Drusus and Antonia Minor and sister to Roman Emperor Claudius and general Germanicus, and thus paternal aunt of emperor Caligula and maternal great-aunt of emperor Nero, as well as the niece and daughter-in-law of Tiberius. She was named after her grandmother, Augustus' wife Livia Drusilla, and commonly known by her family nickname Livilla ("little Livia"). She was born after Germanicus and before Claudius.

Charles Sobhraj is a French serial killer, fraudster, and thief whose victims were mainly Western tourists travelling on the hippie trail of South Asia during the 1970s. He is of Sindhi and Vietnamese origin. He was known as the Bikini Killer because of the attire of several of his victims, as well as the Splitting Killer and the Serpent for "his snake-like ability to avoid detection by authorities".

Soviet partisan (1926–1944)

sentenced to death in France

British general practitioner and fraudster (1899–1983)

thumbnail|''Locusta testing in Nero's presence the poison prepared for Britannicus'', painting by Joseph-Noël Sylvestre, 1876

Canadian convicted killer (manslaughter) and ex-wife of Paul Bernardo

murder scandal in France during the reign of Louis XIV

French murderer

Alleged sorceress

American serial killer (1854–1938)

English serial killer

Italian poisoner

American executed homeopath (1862–1910)

American serial killer (1932-1984)

American serial killer (1905–1965)

American serial killer (1906–1938)

Yugoslavian serial killer

female group of murderers in Hungary

Nurse convicted of killing patients

Dutch serial killer (1839–1915)

Scottish-Canadian serial killer

French domestic servant and serial killer (1803-1852)

Polish serial killer (1865–1903)

American serial killer

English doctor found guilty of murder (1824–1856)

American serial killer (1933–1991)

string of murders in Chicago in 1982 involving poisoned Tylenol medicine

Norwegian nurse and serial killer (1936–2025)

Romanian serial killer (1903–1960)

former chief assistant for the Indian mystic Rajneesh

German serial killer

serial killer

The Vishakanya ( ) were young women reportedly used as assassins, often against powerful enemies, in Ancient India. Their blood and bodily fluids were purportedly poisonous to other humans, as was mentioned in the ancient Indian treatise on statecraft, Arthashastra, written by Chanakya, an adviser and a prime minister to the first Maurya Emperor Chandragupta (c. 340–293 BC).

16th century physician

British serial killer (teacup poisoner)

American female serial killer

French convicted murderer (1915–1966)

Roman noblewoman who lived during the reigns of Augustus and Tiberius

Byzantine Empire politician

American serial killer (1929-2011)

American serial killer (1952–2017)

Queen of Anuradhapura

king of Cyrenaica in 550 BC

Soviet biochemist who started NKVD poison study program (1899–1964)

Japanese mass murderer responsible for the 2001 Osaka School Massacre (1963–2004)

American physician and serial killer

German psychiatrist (1889–1945)

alias for blackmail person or group

Italian astrologer

Italian criminal

quartet of Austrian nurses convicted of serial murders

English artist and serial killer (1794-1847)

American serial killer (1943-1998)

German serial killer (1760-1811)

German former nurse and serial killer