Around the world, Mariana Andrea (Mariana Andrea 
) is quite a rare girly forename. The first name Mariana Andrea is habitual in Chile, where it is quite a rare feminine name, Costa Rica, where it is a rare feminine name, and Romania. Measured by absolute frequency, it is the most numerous in Chile, Romania, and Argentina. Much less frequently, Mariana Andrea is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mariana Andrea | Romania, Argentina, Ecuador, Chile, Colombia |