Here's my suggestions of names:
Dhaka Dalals
Chittagong Choruis
Sylhet Shutkis
Khulna Khalas
Barisal Buras
Rajshahi Rajbiharis
On a more serious attempt:
Jalalabad Saints (Sylhet- Home of 360 Saints)
Rajshahi Rajbiharis (Rajshahi being home of mangoes;Rajbiharis are prob mangoes)
Chiitagong Cyclones (I like it)
Khulna Tigers (home of the Bengal tigers)
Barisal Bauls
Dhaka Sepahis
I think both those sets of names are way more creative and less lame than IPL franchises
