Family name Oywan (Oywan 
) , globally, is a very rare last name. The cognomen Oywan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, Oywan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oywan | Philippines, India, Thailand |