Cognomen Каллий (Kalija 
, Kallias 
, Callias 
) , worldwide, is quite a rare surname. The last name Каллий is habitual in Greece, where it is quite a rare surname, Cyprus, and Albania. In absolute terms, it is the most numerous in Greece, the United States, and Albania. Very seldom, Каллий is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kalija | Greece, Albania, Indonesia, United States, India |
| Kallias | Greece, Germany, United Kingdom, United States, Cyprus |
| Callias | United Kingdom, France, United States, South Africa, Australia |
| Каллий | Kazakhstan |