Cognomen Hajs (هاجس 
, Hajs 
, Heiß 
) , worldwide, is quite a common last name. The last name Hajs is habitual in Germany, where it is quite a rare surname, Austria, and Oman, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Germany, Austria, and Saudi Arabia. Much less frequently, Hajs is the forename as well as the last name.