there are descendants from koch-rajbonshi, mech, rabha, bodo and indo-aryan people who converted to islam. they mainly speak the goalpariya dialect . they are mainly settled in the districts of dhuburi, goalpara, south salmara and kokrajhar. these people were loose followers of hinduism. but when a small section of these people converted to islam, the act was frowned upon. the local hindus started calling them "nosto seikh" meaning "spoiled shaikh". but as more number of people got converted to islam with time these people came in contact with mainstream muslims, and the term "nosto seikh" slowly got islamicised into "nashya seikh".