Cognomen Rajun (Rajun 
) , all over the world, is quite a rare last name. The last name Rajun is habitual in Oman, where it is a rare surname, Bangladesh, and Qatar. In absolute terms, it most frequently occurs in Bangladesh, Malaysia, and Indonesia. More frequently, Rajun is the forename as well as the last name.
Sah, Mandal, Manjhi, Mistri, Sharma, Bhuiya, Kesari, Khatun, Kumhar, Pandit, Pandey, Paswan, Prasad, Rajwar, Rawani, Thakur, Vediya, Agrawal, Chauhan, Bhuniya, Keshari, Khatoon, Yadav, Ravidas, Oraon, Gupta, Saw, Ram, Ray, Das, Sahu, Bibi, Khan, Rana, Devi, Gope, Turi, Hadi, Mahto, Mehta, Munda, Singh, Sinha, Bauri, Begam, Kumar, Rajak, Nisha, and Prajapati