Family name Ertmanis (Ertmanis 
) , around the globe, is a very rare cognomen. The surname Ertmanis is habitual in Latvia, where it is quite a rare surname, Canada, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ertmanis | Canada, United States, Latvia |