Where does “kalifornianhiiri” come from?

kalifornianhiiri (Finnish) comes from Finnish hiiri, from Proto-Finnic hiiri, from Proto-Uralic šiŋere — mouse.

Ancestry of “kalifornianhiiri”, step by step

kalifornianhiiri traces back through two separate lines of ancestry.

via Finnish hiiri

StepLanguageWordMeaning
1FinnishhiiriA mouse, used rather indiscriminately for a...
2Proto-Finnichiirimouse
3Proto-Uralicšiŋeremouse

via Finnish Kalifornia

StepLanguageWordMeaning
1FinnishKaliforniaCalifornia's
2EnglishCaliforniaA region on the west coast of North America comprising the US state of California and the Baja California peninsula in Mexico; historically also including other areas in Alta California and Baja California
3SpanishCalifornia
Every word from Proto-Uralic šiŋereEvery word from Proto-Finnic hiiriEvery word from Finnish hiiri