Surname Onchana (Onchana 
) , in all the world, is a rare family name. The cognomen Onchana is habitual in Kenya, where it is a rare surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Onchana is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onchana | Kenya, Thailand, United States, Peru, India |