Klaas Annink (18 June 1710 – 13 September 1775), better known as Huttenkloas, was a Dutch murderer and suspected serial killer in Twente, Dutch Republic. Records of his life frequently mention that he was born in Bentelo.

John George Haigh ( HEYG; 24 July 1909 – 10 August 1949), commonly known as the Acid Bath Murderer, was an English serial killer convicted for the murders of six people, although he claimed to have killed nine. Haigh battered to death or shot his victims and disposed of their bodies using sulphuric acid before forging their signatures so he could sell their possessions and collect large sums of money.