Where does “valkokylkijänis” come from?

valkokylkijänis (Finnish) comes from Finnish kylki, from Proto-Finnic külki — side, flank.

Ancestry of “valkokylkijänis”, step by step

valkokylkijänis traces back through two separate lines of ancestry.

via Finnish kylki

StepLanguageWordMeaning
1Finnishkylkiside; sparerib; loin
2Proto-Finnickülkiside, flank

via Finnish jänis

StepLanguageWordMeaning
1Finnishjänishare; mountain hare, "Lepus timidus"; stowaway
2Proto-Finnicjänishare
Every word from Proto-Finnic külki →Every word from Finnish kylki →