Worldwide, Hylja (Hilen 
, Hulder 
, Hølje 
) is quite a rare primarily girly, but scarcely male first name. The first name Hylja is characteristic of Namibia, where it is quite a rare girly name, Iraq, where it is a rare largely girly, but infrequently male name, and Argentina, where it is a rare feminine name. Measured by absolute frequency, it is the most numerous in India, Iraq, and Argentina. Very seldom, Hylja is the last name as well as the forename.