Cognomen Іоаннідіс (Ioannidis 
, Іоаннідіс 
) , all around the world, is a common family name. The last name Іоаннідіс is habitual in Cyprus, where it is a common surname, Greece, and Australia, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Greece, Cyprus, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Ioannidis | Australia, Germany, Greece, United States, Cyprus |
| Іоаннідіс | Ukraine |