Kaiser is the German title meaning "Emperor", derived ultimately from the name of Julius Caesar. Many languages use a descendant of the word Caesar to mean "emperor", such as Russian царь (tsar) and Greek Καῖσαρ (Kaîsar).
Usage See Special:Whatlinkshere/Etymology:Kaiser for a list of articles using this term. This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.