Family name Ohna (Ohna 
) , throughout the world, is a rare cognomen. The cognomen Ohna is habitual in Norway, where it is quite a rare surname, Morocco, where it is a rare surname, and Nigeria, where it is an extremely rare surname. Also, Ohna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ohna | Norway, Morocco, South Africa, Nigeria, Philippines |