Where does “Oulu” come from?

Oulu (Polish) comes from Finnish Oulu, from Proto-Samic oalē — waterway.

Ancestry of “Oulu”, step by step

StepLanguageWordMeaning
1FinnishOulua city in northern Finland
2Proto-Samicoalēwaterway
Every word from Proto-Samic oalēEvery word from Finnish Oulu