Where does “arokoivuhiiri” come from?

arokoivuhiiri (Finnish) comes from Finnish koivuhiiri, from Finnish Koivu, from Finnish koivu, from Proto-Finnic koivu, from Proto-Uralic kojwa — birch.

Ancestry of “arokoivuhiiri”, step by step

arokoivuhiiri traces back through two separate lines of ancestry.

via Finnish koivuhiiri

StepLanguageWordMeaning
1Finnishkoivuhiirinorthern birch mouse, Sicista betulina; birch...
2FinnishKoivubirch deciduous tree of the genus
3Finnishkoivubirch
4Proto-Finnickoivubirch
5Proto-Uralickojwabirch

via Finnish aro

StepLanguageWordMeaning
1Finnisharosteppe; humid or swampy meadow or plain
2Latin-lanominative feminine singular of -lus; nominative...
Every word from Proto-Uralic kojwaEvery word from Proto-Finnic koivuEvery word from Finnish koivu