Worldwide, Diak (Diak 
, Диак 
, Дьяк 
) is a rare primarily boy's, but very infrequently girly first name. The forename Diak is habitual in Indonesia, where it is a very rare boy's name, Nigeria, where it is an extremely rare unisex name, and India, where it is an extremely rare dominantly boy's, but uncommonly female name. More prevalently, Diak is the last name as well as the forename.