Surname แจ่มจ้อย (Chaemchoi 
, แจ่มจ้อย) , all over the world, is a rare family name. The cognomen แจ่มจ้อย is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, แจ่มจ้อย is the forename as well as the last name.