Where does “Brest” come from?

Brest (Portuguese) comes from French Brest, from Proto-Celtic brixs, from Proto-Indo-European bʰerǵʰ- — to rise; high, lofty; hill, mountain.

Ancestry of “Brest”, step by step

Brest traces back through two separate lines of ancestry.

via French Brest

StepLanguageWordMeaning
1FrenchBreston the border with Poland
2Proto-Celticbrixshill
3Proto-Indo-Europeanbʰerǵʰ-to rise; high, lofty; hill, mountain

via Belarusian Брэст

StepLanguageWordMeaning
1BelarusianБрэст—
Every word from Proto-Indo-European bʰerǵʰ- →Every word from Proto-Celtic brixs →Every word from French Brest →
Brest — Etymology, Origin & Word History | Etymology Explorer