Hélène Jégado (1803 – 26 February 1852) was a French domestic servant and serial killer. She is believed to have murdered as many as 36 people with arsenic over a period of 18 years. After an initial period of activity, between 1833 and 1841, she seems to have stopped for nearly ten years before a final spree in 1851.
Christine Malèvre (born 10 January 1970) is a former nurse who was arrested in 1998 on suspicion of having killed as many as 30 patients. She confessed to some of the murders, but claimed she had done so at the request of the patients, who were all terminally ill. France, however, does not recognize a right to die, and Malèvre eventually recanted most of her confessions. The families of several of her victims strongly denied that their relatives had expressed any will to die, much less asked Malèvre to kill them.
Véronique Courjault (born Fièvre; 1968) is a French citizen who confessed to having killed three of her babies, two of whom she stored in a freezer at her home. Her case has been referred to in the media as the "affaire des bébés congelés," or "frozen babies case".
Jeanne Weber (7 October 1874 – 5 July 1918) was a French serial killer. She strangled at least 10 children, including her own. She was both convicted of murder and declared insane in 1908; she hanged herself ten years later.