Last name คำสัญญา (Khamsanya 
, Promse 
, คำสัญญา) , worldwide, is a rare cognomen. The surname คำสัญญา is habitual in Laos, where it is quite a rare surname, Nigeria, where it is a very rare surname, and Thailand, where it is an extremely rare surname. More prevalently, คำสัญญา is the forename as well as the last name.