Where does “Aino” come from?

Aino (Estonian) comes from Finnish Aino, from Finnish ainoa, from Proto-Germanic ainagaz, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “Aino”, step by step

StepLanguageWordMeaning
1FinnishAinoA heroine in the Kalevala
2Finnishainoaonly, sole; only
3Proto-Germanicainagazonly; sole; singular; unique
4Proto-Germanicainazone; some
5Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-Germanic ainagaz →