Where does “ukkoteeri” come from?

ukkoteeri (Finnish) comes from Finnish Ukko, from Finnish ukko, from Proto-Finnic ukko — old man.

Ancestry of “ukkoteeri”, step by step

ukkoteeri traces back through two separate lines of ancestry.

via Finnish Ukko

StepLanguageWordMeaning
1FinnishUkkosupreme god in Finnish mythology; Ukko's < Ukko,...
2Finnishukkoold man, gaffer; adult male wood grouse or black...
3Proto-Finnicukkoold man

via Finnish teeri

StepLanguageWordMeaning
1Finnishteeriblack grouse, "Lyrurus tetrix", formerly "Tetrao...
2Proto-Finnictetriblack grouse
Every word from Proto-Finnic ukko →Every word from Finnish ukko →Every word from Finnish Ukko →
ukkoteeri — Etymology, Origin & Word History | Etymology Explorer