This is a list of surnames in which the categories include Agatha Christie characters.
BattleEnglish From a nickname for a combative person. In some cases it may come from the name of English places called Battle, so named because they were sites of battles.
HolmesEnglish, Scottish Variant of Holme. A famous fictional bearer was Sherlock Holmes, a detective in Arthur Conan Doyle's mystery stories beginning in 1887.
PoirotFrench, Literature From a diminutive of French poire "pear", originally referring to a pear merchant or someone who lived near a pear tree. Starting in 1920 this name was used by the mystery writer Agatha Christie for her Belgian detective Hercule Poirot. Christie based the name on that of Jules Poiret, a contemporary fictional detective.