Where does “डोई” come from?

डोई (Marathi) comes from Old Marathi डोइ, from Proto-Indo-Aryan ḍōka.

डोई (Marathi): head

Definitions

Step	Language	Word	Meaning
1	Old Marathi	डोइ	—
2	Proto-Indo-Aryan	ḍōka	—

डोई — Etymology, Origin & Word History | Etymology Explorer