Hauptmann is a German word usually translated as captain when it is used as an officer's rank in the German, Austrian, and Swiss armies. While Haupt in contemporary German means 'main', it also has and originally had the meaning of 'head', i.e. Hauptmann literally translates to 'head-man', which is also the etymological root of captain (from Latin caput, 'head'). It equates to the rank of captain in the British and US Armies, and is rated OF-2 in NATO.