Last name Constanza Antonia (Constanza Antonia 
) , in the world, is a very rare surname. The cognomen Constanza Antonia is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More prevalently, Constanza Antonia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Constanza Antonia | Chile, Argentina |