
Dutt/Dutta/Datta is a common Hindu (religion) surname found in Eastern India (West Bengal, Assam, Tripura) and also in Bangladesh. They mostly belong to the caste Kayastha or Banik.
http://en.wikipedia.org/wiki/Dutta
Kayastha Dutta According to legend, five Kayasthas migrated to Bengal around 1050 AD 1. Purushottama Datta (Dutta) 2. Makaranda Ghosh 3. Dasartha Basu(Bose) 4. Kali Dasa Mitra 5. Virata (Dasaratha) Guha
The Kayastha Duttas claim that they all descended from Purushottama Dutta and within the Kayastha community they belong to Maulik sub class. Ghosh, Bose and Mitra belong to the higher Kulin sub class.
Gotros of Dutta - Bharadwaj, Shandilya, Kasyap, Moudgulyo, Alimman
Subarnabanik Dutta