Cognomen Ioan-Adrian (Ioan-Adrian 
) , in the world, is a very rare family name. The surname Ioan-Adrian is characteristic of Eastern Europe, particularly Romania, where it is a rare surname. More frequently, Ioan-Adrian is the forename as well as the last name. Parts of the name also exists independently as a first name Ioan, and a first name Adrian.
| VARIANT | COUNTRY |
|---|---|
| Ioan-Adrian | Germany, France, Romania |