Where does “Бангладеш” come from?

Бангладеш (Mongolian) comes from Russian Бангладе́ш, from English Bangladesh, from Bengali বাংলাদেশ, from Bengali দেশ, from Sanskrit देश, from Proto-Indo-Aryan dayśás, from Proto-Indo-Iranian dayćás, from Proto-Indo-European deyḱ- — to point out.

Ancestry of “Бангладеш”, step by step

StepLanguageWordMeaning
1RussianБангладе́ш
2EnglishBangladesh
3BengaliবাংলাদেশBengal, Bengali region; Bengali land
4Bengaliদেশcountry; state
5Sanskritदेशpoint, region, spot, place, part, portion;...
6Proto-Indo-Aryandayśáspoint, region, part; country, province
7Proto-Indo-Iraniandayćáspart, point; country
8Proto-Indo-Europeandeyḱ-to point out
Every word from Proto-Indo-European deyḱ-Every word from Proto-Indo-Iranian dayćásEvery word from Proto-Indo-Aryan dayśás