Family name คอยล์ (Khoi 
, คอยล์ 
) , worldwide, is quite a rare cognomen. The last name คอยล์ is habitual in Malaysia, where it is quite a rare surname, Vietnam, and Taiwan, where it is a rare surname. Not in comparison with a country's population, the name is most common in South-eastern Asia, particularly Vietnam, Malaysia, and Indonesia. More frequently, คอยล์ is the forename as well as the last name.