“alaya” (As in Himalaya) in Sanskrit means “house” Bangla is also known as Vanga. The movement against break up of Bagladesh by British was famously known as “Vang Bhang” movement. Bhang in Hindi means -to break. You are right about “aal” as home. Actually, “aalay” means home itself. “Devalay” home of Gods, that is Temple, Mrigalay is home of animals (mrig), that is Zoe. Vanga has thus been a distinct geographical identity and the restoration of the old name can be one option. And Bengal is nothing but the Vanga, and the easiest way to maintain the legacy is to drop the 'West' from West Bengal. Vanga is synonymous with Banga because the alphabets V and B are interchangeable in Sanskrit. Banga in its etymological sense means Vanga or Vanka — marshy land. It denotes the entire stretch of lower Bengal when the sea receded and the landmass became fit for human habitation. One more thought BANGA – BA stands for river Brahmaputra and NGA for Ganga, as both the river meets here.