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 | Spain, United States |
| Calaje | Bolivia, Brazil, Philippines |