Family name พันธุวัฒน์ (พันธุวัฒน์ 
, Phanthuwat 
) , all around the world, is a rare cognomen. The last name พันธุวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, พันธุวัฒน์ is the forename as well as the last name.