In the entire world, 乃夫 (乃夫 
, Naifu 
) is quite a rare principally boy's, but scarcely feminine first name. The first name 乃夫 is habitual in China, where it is a very rare predominantly male, but very infrequently feminine name, Tanzania, where it is a very rare boy's name, and Nigeria, where it is an extremely rare male name. Much less frequently, 乃夫 is the last name as well as the forename.