Where does “harjashäntähiiri” come from?

harjashäntähiiri (Finnish) comes from Finnish harjas, from Finnish harja, from Russian Харитон, from Finnish -nen, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

Ancestry of “harjashäntähiiri”, step by step

harjashäntähiiri traces back through 3 separate lines of ancestry.

via Finnish harjas

StepLanguageWordMeaning
1Finnishharjasbristle
2Finnishharjabrush; mane; crest
3RussianХаритон
4Finnish-nenForms diminutives nouns or terms expressing...
5Finnish-inen-like, -ous, -y; -en; Creates adjectives from...
6Finnish-uusForms nouns from adjectives, expressing a quality
7Proto-Finnic-uc-ness, -hood

via Finnish häntä

StepLanguageWordMeaning
1Finnishhäntäa narrow tail; ogonek; Partitive form of hän
2Proto-Finnichäntätail
3Proto-Uralicčänčä

via Finnish hiiri

StepLanguageWordMeaning
1FinnishhiiriA mouse, used rather indiscriminately for a...
2Proto-Finnichiirimouse
3Proto-Uralicšiŋeremouse
Every word from Proto-Finnic -ucEvery word from Finnish -inenEvery word from Finnish -uus