Last name Гефен (Gefen 
, גפן , Гефен 
) , in the entire world, is quite a rare cognomen. The cognomen Гефен is habitual in Israel, where it is quite a common surname, Hong Kong, where it is a rare surname, and Switzerland. Measured by absolute frequency, it is the most numerous in Israel, the United States, and Hong Kong. Much less frequently, Гефен is the forename as well as the last name.