Last name Twan (Twan 
, ตวัน 
, Тван 
) , globally, is quite a rare surname. The cognomen Twan is habitual in Myanmar, where it is quite a rare surname, Malaysia, and Canada, where it is a rare surname. Measured by absolute frequency, the name is most common in South-eastern Asia, particularly Myanmar, Malaysia, and Indonesia. Likewise, Twan is the forename as well as the last name.