Surname Mrtnz (Mrtnz 
) , in the entire world, is a rare cognomen. The family name Mrtnz is habitual in Latin America and the Caribbean, particularly El Salvador, where it is quite a rare surname, Panama, and Guatemala, where it is a rare surname. Measured by absolute frequency, it is commonest in Latin America and the Caribbean, particularly El Salvador, Colombia, and Guatemala.
| VARIANT | COUNTRY |
|---|---|
| Mrtnz | Panama, Dominican Republic, El Salvador, Colombia, Guatemala |