Family name ארסוי (Ersoy 
, ארסוי 
, Ersoj 
) , in all the world, is a common cognomen. The cognomen ארסוי is habitual in Turkey, where it is quite a common surname, Cyprus, where it is quite a rare surname, and North Macedonia. In absolute terms, it is the most numerous in Turkey, Germany, and Austria. Very seldom, ארסוי is the forename as well as the last name.