Where does “taivaanvalkea” come from?

taivaanvalkea (Finnish) comes from Finnish taivas, from Proto-Finnic taivas, from Proto-Balto-Slavic deiwas, from Proto-Indo-European deywós, from Proto-Indo-European dyew- — to be bright; sky, heaven.

Ancestry of “taivaanvalkea”, step by step

taivaanvalkea traces back through two separate lines of ancestry.

via Finnish taivas

StepLanguageWordMeaning
1Finnishtaivassky; heaven
2Proto-Finnictaivassky
3Proto-Balto-Slavicdeiwasgod
4Proto-Indo-Europeandeywósgod
5Proto-Indo-Europeandyew-to be bright; sky, heaven

via Finnish valkea

StepLanguageWordMeaning
1Finnishvalkeawhite; bright; fire, campfire
2Proto-Finnicvalkedawhite
3Proto-Finno-Ugricwëlketa—
Every word from Proto-Indo-European dyew- →Every word from Proto-Indo-European deywós →Every word from Proto-Balto-Slavic deiwas →