Last name ยงพันธ์ (ยงพันธ์ 
, Yongphan 
) , across the world, is a very rare surname. The family name ยงพันธ์ is characteristic of Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, ยงพันธ์ is the forename as well as the last name.