Family name Ioan-Corneliu (Ioan-Corneliu 
) , across the world, is a very rare cognomen. The family name Ioan-Corneliu is characteristic of Eastern Europe, particularly Romania, where it is a rare surname. More prevalently, Ioan-Corneliu 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 Corneliu.
| VARIANT | COUNTRY |
|---|---|
| Ioan-Corneliu | Romania |