Where does “Kirppu” come from?

Kirppu (English) comes from Finnish kirppu, from Proto-Finnic kirppu — flea.

Ancestry of “Kirppu”, step by step

StepLanguageWordMeaning
1Finnishkirppuflea
2Proto-Finnickirppuflea
Every word from Proto-Finnic kirppu →Every word from Finnish kirppu →