Cognomen อมรพันธุ์ (Amornpan 
, อมรพันธุ์ , Amonpan 
) , throughout the world, is a rare last name. The surname อมรพันธุ์ is habitual in Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and China. Measured by absolute frequency, the name is most common in Thailand, China, and the United States. More prevalently, อมรพันธุ์ is the forename as well as the last name.