In all the world, 易斯 (Yisi 
, 易斯 ) is quite a rare epicene forename. The first name 易斯 is habitual in Panama, where it is quite a rare female name, the Dominican Republic, where it is a rare girly name, and China, where it is a very rare dominantly boy's, but seldom girly name. Much less frequently, 易斯 is the last name as well as the forename.