Worldwide, ไอยู (Iyoo 
, Iyuh 
, ไอยู 
) is a rare predominantly masculine, but very infrequently feminine first name. The forename ไอยู is characteristic of Nigeria, where it is a very rare mostly masculine, but uncommonly female name, and Indonesia, where it is a very rare boy's name. Likewise, ไอยู is the last name as well as the forename.