In the world, Костаки (Costakis 
, Kostaki 
, Костаки 
) is a rare masculine forename. The forename Костаки is characteristic of Cyprus, where it is quite a rare boy's name, Greece, where it is a rare boy's name, and the United Kingdom, where it is a very rare male name. More frequently, Костаки is the last name as well as the forename.