Where does “Koivuaho” come from?

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

Ancestry of “Koivuaho”, step by step

Koivuaho 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 Aho

StepLanguageWordMeaning
1FinnishAhoAny of a number of small places in Finland
2Proto-Finnicahoabandoned swidden; glade (grassy open or cleared space in a forest)
3Proto-Germanicaskǭash, ashes
4Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth
Every word from Proto-Uralic kojwaEvery word from Proto-Finnic koivuEvery word from Finnish koivu