Where does “ব্রহ্মদেশ” come from?

ব্রহ্মদেশ (Bengali) comes from Sanskrit ब्रह्मदेश, from Sanskrit देश, from Proto-Indo-Aryan dayśás, from Proto-Indo-Iranian dayćás, from Proto-Indo-European deyḱ- — to point out.

Ancestry of “ব্রহ্মদেশ”, step by step

Step	Language	Word	Meaning
1	Sanskrit	ब्रह्मदेश	—
2	Sanskrit	देश	point, region, spot, place, part, portion;...
3	Proto-Indo-Aryan	dayśás	point, region, part; country, province
4	Proto-Indo-Iranian	dayćás	part, point; country
5	Proto-Indo-European	deyḱ-	to point out

Every word from Proto-Indo-European deyḱ- →

ব্রহ্মদেশ — Etymology, Origin & Word History | Etymology Explorer