Cognomen Sewana (Sewana 
) , globally, is a very rare family name. The surname Sewana is habitual in Thailand, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Likewise, Sewana is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sewana | India, Thailand, United States, South Africa, Nigeria |