Cognomen Calaix (Calaix 
, Calaje 
) , worldwide, is a rare last name. The surname Calaix is characteristic of Bolivia, where it is a rare surname, Philippines, and Brazil, where it is an extremely rare surname. Much less frequently, Calaix is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Calaix | United States, Spain |
| Calaje | Brazil, Bolivia, Philippines |