Where does “Moskva” come from?

Moskva comes from Russian Moskva, a city name of ultimately unknown origin.

Ancestry of “Moskva”, step by step

Step	Language	Word	Meaning
1	Russian	Москва́	Moscow
2	Old East Slavic	Москꙑ	—
3	Proto-Slavic	mosky	—

Moskva — Etymology, Origin & Word History | Etymology Explorer