Where does “käosulane” come from?

käosulane (Estonian) comes from Estonian kagu, from Proto-Finno-Ugric *käkoi.

käosulane (Estonian): icterine warbler (Hippolais icterina)

Definitions

  1. icterine warbler (Hippolais icterina)

Ancestry of “käosulane”, step by step

käosulane traces back through two separate lines of ancestry.

via Estonian kagu

StepLanguageWordMeaning
1Estoniankagusoutheast
2Proto-Finno-Ugric*käkoi—

via Estonian sulane

StepLanguageWordMeaning
1EstoniansulaneLaborer for a livelyhood; mostly as the aid in the agricultural field, a farmhand
Every word from Proto-Finno-Ugric *käkoi →Every word from Estonian kagu →