Cognomen อรรถวาทิน (อรรถวาทิน 
, Attawatin ) , in the entire world, is a very rare family name. The last name อรรถวาทิน is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, อรรถวาทิน is the forename as well as the last name.