Where does “বাহৰেইন” come from?

বাহৰেইন (Assamese) comes from English Bahrain, from Arabic الْبَحْرَيْن — Bahrain; the two seas.

Ancestry of “বাহৰেইন”, step by step

Step	Language	Word	Meaning
1	English	Bahrain	—
2	Arabic	الْبَحْرَيْن	Bahrain; the two seas