Where does “vihdaskoivu” come from?

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

Ancestry of “vihdaskoivu”, step by step

vihdaskoivu traces back through two separate lines of ancestry.

via Finnish Koivu

StepLanguageWordMeaning
1FinnishKoivubirch deciduous tree of the genus
2Finnishkoivubirch
3Proto-Finnickoivubirch
4Proto-Uralickojwabirch

via Finnish vihta

StepLanguageWordMeaning
1FinnishvihtaA kind of whip made of birch twigs and used in...
2Proto-Samicvittëfive
3Proto-Uralicwittefive; ten
Every word from Proto-Uralic kojwaEvery word from Proto-Finnic koivuEvery word from Finnish koivu