That's not a union, that was BJP bengal who wantwd to rename Sdah. They don't want to change the name of West Bengal even though no East bengal exists just to retain the historical values, which has been demanded by normal public of Bengal irrespective of any political party, but on the other hand, they want to rename Sdah to Shyama Prasad Mukherjee. I doubt where their "hostorical values" goes in the latter case