Last name Гирнис (Гирнис 
, Girnis 
) , worldwide, is a rare cognomen. The last name Гирнис is characteristic of Northern Europe, particularly Latvia, where it is quite a rare surname, Lithuania, and Denmark, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Russia, Latvia, and Lithuania.
| VARIANT | COUNTRY |
|---|---|
| Гирнис | Belarus, Russia, Kazakhstan |
| Girnis | Lithuania, Denmark, Latvia, United States |