Cognomen Chaek (Chaek 
, แฉก , แจ๊ก) , globally, is a very rare last name. The family name Chaek is characteristic of Indonesia, where it is a very rare surname, Brazil, and the United States, where it is an extremely rare surname. In absolute terms, it is the most numerous in Indonesia, Brazil, and India. Also, Chaek is the forename as well as the last name.