Cognomen Molinarius (Molinarius 
, Mylläri 
) , in all the world, is a rare family name. The cognomen Molinarius is habitual in Finland, where it is quite a rare surname, Sweden, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Molinarius | United States |
| Mylläri | Finland, United States, Sweden |