Globally, Haessen (Has 
, Haessen 
) is a common epicene forename. The forename Haessen is habitual in Brunei, where it is quite a common unisex name, Morocco, where it is quite a rare gender-neutral name, and Tunisia, where it is quite a rare largely boy's, but infrequently female name. Measured by absolute frequency, it most frequently occurs in India, Morocco, and Egypt. Likewise, Haessen is the last name as well as the forename.