Last name Йонас-Владисловас (Йонас-Владисловас 
) , around the world, is an extremely rare cognomen. Much more prevalently, Йонас-Владисловас is the forename as well as the last name. Parts of the name also exists independently as a first name Йонас, and a first name Владисловас.
| VARIANT | COUNTRY |
|---|---|
| Йонас-Владисловас | Russia |