Cognomen แซ่เห้ง (Saeheng 
, แซ่เห้ง) , around the world, is quite a rare family name. The surname แซ่เห้ง is habitual in Thailand, where it is quite a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, it is the most numerous in Thailand, China, and Australia.