Surname พันธุ์วัฒน์ (พันธุ์วัฒน์ 
) , all over the world, is a very rare cognomen. The cognomen พันธุ์วัฒน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, พันธุ์วัฒน์ is the forename as well as the last name.