In all the world, Sifen (思芬 
, Sifen 
) is a rare predominantly girly, but very seldom masculine first name. The forename Sifen is characteristic of United Arab Emirates, where it is a rare female name, Saudi Arabia, where it is a very rare feminine name, and China, where it is a very rare principally feminine, but very infrequently boy's name. Very seldom, Sifen is the last name as well as the forename.