Cognomen แก้ววรรณ (Kaeawan 
, แก้ววรรณ, Kaewvarn ) , all around the world, is a very rare family name. The cognomen แก้ววรรณ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, แก้ววรรณ is the forename as well as the last name.