Cognomen Dzhan (Джан 
, Dzhan 
) , globally, is a rare family name. The surname Dzhan is habitual in Bulgaria, where it is quite a rare surname, Kazakhstan, and Kyrgyzstan, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Russia, Kazakhstan, and Ukraine. Likewise, Dzhan is the forename as well as the last name.