Dagmar Johanne Amalie Overbye (Danish: [ˈtɑwmɑ ˈɒwɐˌpyˀ]; 23 April 1887 – 6 May 1929) was a Danish serial killer. She murdered between nine and 25 children, including one of her own, during a seven-year period from 1913 to 1920.

Edward James Adams (April 23, 1887 – November 22, 1921) was a notorious American criminal and spree killer in the Midwest. He murdered seven people—including three policemen—over a period of around 14 months and wounded at least a dozen others.

Armin Meiwes (German: [ˈmaɪvəs]; born 1 December 1961) is a German former computer repair technician who received international attention for murdering and cannibalising Bernd Brandes, whom he had found via the Internet as a voluntary victim, in March 2001.