Worldwide, Mary Sonia (Mary Sonia 
) is a rare girly first name. The forename Mary Sonia is habitual in Latin America and the Caribbean, particularly Bolivia, where it is a rare feminine name, Peru, and Chile, where it is a very rare female name. Measured by absolute frequency, it is commonest in Bolivia, Peru, and Philippines. Much less frequently, Mary Sonia is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mary Sonia | Peru, Philippines, Bolivia, Chile, Ecuador |