Dibyendu Chakraborty 
Origin of Bangla (First Part) A Mythical Voyage [EPUB ebook] 

By the beckoning of destiny, Naru could deduce that the word 'Bangla’ was coined by the Tibetan traders. Nobody knows for sure where the word 'Bangla’ came from. Curiosity about origin and lineage is an integral part of human existence. Naru, an ever curious Bengali by birth, found an explanation in his own way, which he thought to share with a considerably big group known as Bengali and speaking Bangla language.