Family name ארגאי (Aregai 
, ארגאי 
) , worldwide, is a rare cognomen. The last name ארגאי is habitual in Ethiopia, where it is a rare surname, Sweden, and Norway. Not in comparison with a country's population, it most frequently occurs in Ethiopia, Sweden, and the United States. Likewise, ארגאי is the forename as well as the last name.