Where does “বনগাঁ” come from?

বনগাঁ (Bengali) comes from Assamese গা, from Sauraseni Prakrit 𑀕𑀸𑀫, from Sanskrit ग्राम, from Proto-Indo-Aryan grā́mas, from Proto-Indo-Iranian grā́mas, from Proto-Indo-European h₂ger- — to gather; flock, herd.

Ancestry of “বনগাঁ”, step by step

বনগাঁ traces back through two separate lines of ancestry.

via Assamese গা

Step	Language	Word	Meaning
1	Assamese	গা	body, physique; to sing
2	Sauraseni Prakrit	𑀕𑀸𑀫	—
3	Sanskrit	ग्राम	an inhabited place, village, hamlet, settlement;...
4	Proto-Indo-Aryan	grā́mas	—
5	Proto-Indo-Iranian	grā́mas	village, town; community
6	Proto-Indo-European	h₂ger-	to gather; flock, herd

via Assamese বন

Step	Language	Word	Meaning
1	Assamese	বন	grass, shrub, small plant; woodland, forest; wild
2	Sanskrit	वन	a tree; a forest, wood, grove, thicket, quantity...
3	Proto-Indo-European	wen-	to wish for, desire, strive for, win, love; to...

Every word from Proto-Indo-European h₂ger- →Every word from Proto-Indo-Iranian grā́mas →Every word from Proto-Indo-Aryan grā́mas →