Where does “mesklen” come from?

mesklen (Cornish) comes from Cornish meskel, from Old Cornish mesclen, from Latin mūsculus, from Ancient Greek μῦς, from Proto-Hellenic *mū́s, from Proto-Indo-Iranian múHs, from Proto-Indo-European múh₂s — mouse.

Ancestry of “mesklen”, step by step

StepLanguageWordMeaning
1Cornishmeskelmussels
2Old Cornishmesclen—
3Latinmūsculusa small mouse
4Ancient Greekμῦςmouse; A type of mussel; A type of whale
5Proto-Hellenic*mū́s—
6Proto-Indo-IranianmúHsmouse
7Proto-Indo-Europeanmúh₂smouse
Every word from Proto-Indo-European múh₂s →Every word from Proto-Indo-Iranian múHs →Every word from Proto-Hellenic *mū́s →