Where does “Kalkutta” come from?

Kalkutta (Finnish) comes from English Calcutta, from Bengali কলকাতা, from Bengali কলিকাতা.

Ancestry of “Kalkutta”, step by step

Step	Language	Word	Meaning
1	English	Calcutta	—
2	Bengali	কলকাতা	—
3	Bengali	কলিকাতা	—

Kalkutta — Etymology, Origin & Word History | Etymology Explorer