Cognomen Thewa (เทวา 
, Thewa 
, เทวะ ) , in the world, is a rare last name. The cognomen Thewa is habitual in Thailand, where it is a rare surname, Tanzania, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Thailand, Tanzania, and India. More frequently, Thewa is the forename as well as the last name.