Cognomen 승환 (승환 
, Seunghwan 
, Seung-Hwan 
) , worldwide, is a rare family name. The cognomen 승환 is habitual in South Korea, where it is quite a rare surname, Cambodia, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in South Korea, China, and India. More frequently, 승환 is the forename as well as the last name.