Last name ธัญพันธ์ (Tanyapan 
, ธัญพันธ์ , Thunaphan ) , in the entire world, is a very rare surname. The surname ธัญพันธ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ธัญพันธ์ is the forename as well as the last name.