Worldwide, Myrnna (Myrnna 
) is a very rare girly forename. The forename Myrnna is habitual in Latin America and the Caribbean, particularly Brazil, where it is a very rare girly name. Very seldom, Myrnna is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Myrnna | Philippines, Mexico, United States, Argentina, Brazil |