Where does “Länsi-Bengali” come from?

Länsi-Bengali (Finnish) comes from Finnish Bengali, from English Bengali, from English Bengal, from Portuguese Bengala, from Persian بنگاله, from Middle Bengali বাঙ্গালা, from Sanskrit वङ्गाल.

Ancestry of “Länsi-Bengali”, step by step

Länsi-Bengali traces back through two separate lines of ancestry.

via Finnish Bengali

StepLanguageWordMeaning
1FinnishBengaliregion of South Asia
2EnglishBengaliOf, from or pertaining to Bengal or the Bengalis;...
3EnglishBengalA short-haired domestic cat breed, which...
4PortugueseBengalaBengal
5Persianبنگاله—
6Middle Bengaliবাঙ্গালাBengal
7Sanskritवङ्गाल—

via Finnish länsi

StepLanguageWordMeaning
1Finnishlänsiwest; the West
2Proto-Finniclänciwest
3Proto-Finniclancilowland
Every word from Sanskrit वङ्गाल →Every word from Middle Bengali বাঙ্গালা →Every word from Persian بنگاله →