Family name Sioon (Sioon 
) , across the world, is a very rare cognomen. The last name Sioon is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Very seldom, Sioon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sioon | Malaysia, Thailand, United States |