Last name หยาดน้ำค้าง (Yadnamfa 
, Yatnamkhang , หยาดน้ำค้าง) , all over the world, is a very rare surname. The cognomen หยาดน้ำค้าง is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, หยาดน้ำค้าง is the forename as well as the last name.