Cognomen Martianus (Martianus 
) , around the world, is a rare family name. The last name Martianus is habitual in Malaysia, where it is a very rare surname, Indonesia, and Germany, where it is an extremely rare surname. Also, Martianus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Martianus | Tanzania, Germany, Indonesia, Malaysia |