The group is descended from a set of tribals which were collectively referred to as Koches, who converted to Islam as they were unable to find a favourable position in Hindu society and came to be known as the Rajbanshi Muslims.

Their conversion to Islam is said to have taken over two to three centuries, and the Nashya still retain many cultural traits of their pre-Islamic past.For instance the reverence of pirs was a continuation of their previous beliefs.

Most people of the community are non-practicing Muslims though the newer generations are becoming increasing Islamic due to globalization.

From historic evidence, it seems a segment of the population of northern Bengal began to convert to Islam when the region fell under the control of Bakhtiyar Khilji.

The community's contribution to the agriculture of northern West Bengal is substantial, with the Nashya growing jute, tobacco, and rice.