Cognomen קאהאן (Kahan 
, קאהאן 
) , globally, is a common surname. The cognomen קאהאן is habitual in Western Asia, particularly Oman, where it is quite a common surname, Saudi Arabia, and Qatar, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in the United Kingdom, Saudi Arabia, and Bangladesh. Also, קאהאן is the forename as well as the last name.