Where does “Irkutsk” come from?

Irkutsk is the English name for a Russian city, Ирку́тск, whose origin is uncertain.

Ancestry of “Irkutsk”, step by step

Step	Language	Word	Meaning
1	Russian	Ирку́тск	—
2	Russian	-ск	A suffix used in place names
3	Proto-Slavic	-ьskъ	-ic, -ish
4	Proto-Indo-European	-iskos	Characteristic of, typical of, pertaining to

Irkutsk — Etymology, Origin & Word History | Etymology Explorer