Where does “Берни” come from?

Берни (Russian) comes from English Bernie, from English Bernese, from English Bern, from English Bernice, from English Berenice, from Ancient Greek Βερενίκη, from Ancient Macedonian Βερενῑ́κη, from Ancient Greek φέρω — shiny, light brown.

Ancestry of “Берни”, step by step

StepLanguageWordMeaning
1EnglishBernieA Bernese mountain dog
2EnglishBerneseOf, from, or pertaining to, Bern; A native or...
3EnglishBernA placename
4EnglishBernice
5EnglishBerenicenotably of ancient queens of Egypt
6Ancient GreekΒερενίκηa city in Lybia; bringer of victory
7Ancient MacedonianΒερενῑ́κη
8Ancient GreekφέρωI bring, bear, carry
9Proto-Hellenicpʰérōto bear
10Proto-Indo-Europeanbʰéretito be carrying
11Proto-Indo-Europeanbʰēr-shiny, light brown
Every word from Proto-Indo-European bʰēr-