Cognomen น้ำเชื่อม (Namchueam 
, Sypu 
, น้ำเชื่อม) , globally, is a very rare surname. The surname น้ำเชื่อม is habitual in Southern Asia, particularly India, where it is an extremely rare surname. Much less frequently, น้ำเชื่อม is the forename as well as the last name.