Bengali Hindu castes

Kayastha (or Kayasth, ) denotes a cluster of disparate Indian communities broadly categorised by the regions of the Indian subcontinent in which they were traditionally locatedthe Chitraguptavanshi Kayasthas of northern India, the Chandraseniya Kayastha Prabhus of Maharashtra, the Bengali Kayasthas of Bengal and Karanas of Odisha. All of them were traditionally considered "writing castes", who had historically served the ruling powers as administrators, ministers and record-keepers.

Mahishya (IAST: Māhiṣya) is a Bengali Hindu traditionally agrarian caste, and formed the largest caste in undivided Bengal. Mahisyas were, and still are, an extremely heterogeneous caste, encompassing all possible classes in terms of material conditions and ranks — ranging from a majority of small farmers and working class individuals to a significant section of landed magnates and industrial entrepreneurs.

HIndu caste originating from the Bengal region of the Indian subcontinent

Namasudra (), earlier known as Chandal, is an Avarna Bengali Hindu community originating from eastern and central Bengal. The term Chandal or Chandala is usually considered to be a slur. They were traditionally engaged in fishing and as boatmen, and later in cultivation. They lived outside the four-tier ritual varna system and thus were outcastes.