Cognomen สุทธิวรรณ์ (Suthawun 
, สุทธิวรรณ์ , Suttiwun ) , in the entire world, is a very rare surname. The family name สุทธิวรรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สุทธิวรรณ์ is the forename as well as the last name.