Cognomen พันธุ์โรจน์ (พันธุ์โรจน์ 
) , across the world, is an extremely rare family name. The surname พันธุ์โรจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, พันธุ์โรจน์ is the forename as well as the last name.