Cognomen Ефан (Efan 
, Yefang 
, Ефан 
) , worldwide, is quite a rare last name. The cognomen Ефан is characteristic of Israel, where it is quite a rare surname, Indonesia, where it is a rare surname, and Malaysia. Measured by absolute frequency, it is the most numerous in Indonesia, Israel, and Bangladesh. More prevalently, Ефан is the forename as well as the last name.