All over the world, Yahai (Yahai 
, 亚海 ) is quite a common principally male, but very infrequently feminine first name. The forename Yahai is habitual in Algeria, where it is quite a rare principally male, but very seldom feminine name, Nigeria, where it is quite a rare boy's name, and Morocco, where it is a rare boy's name. In absolute terms, this name is the most popular in Nigeria, China, and Algeria. Much less frequently, Yahai is the last name as well as the forename.