Cognomen เหมวัฒน์ (Hemmawat 
, เหมวัฒน์ ) , throughout the world, is a very rare family name. The cognomen เหมวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Also, เหมวัฒน์ is the forename as well as the last name.