Cognomen Sinion (Sinion 
) , in all the world, is a very rare surname. The surname Sinion is habitual in Romania, where it is a rare surname, Peru, where it is a very rare surname, and Mexico, where it is an extremely rare surname. More prevalently, Sinion is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinion | Romania, Peru, Thailand, India, Indonesia |