Last name Biraj (Biraj 
) , around the globe, is quite a rare family name. The cognomen Biraj is habitual in Albania, where it is quite a rare surname, Nepal, and Qatar. Measured by absolute frequency, it is commonest in Southern Asia, particularly India, Nepal, and Bangladesh. More prevalently, Biraj is the forename as well as the last name.
Bai, Thapa, Nayak, Oraon, Yadav, Mandal, Mahato, Mondal, Mishra, Sardar, Sarkar, Saikia, Sharma, Barman, Biswas, Kanwar, Kalita, Gurung, Pradhan, Debnath, Shrestha, Adhikari, Lakra, Ghosh, Gogoi, Dutta, Pal, Ray, Rai, Roy, Dey, Das, Lal, Saha, Sahu, Shah, Debbarma, Paul, Deka, Nath, Majhi, Mohan, Munda, Singh, Kumar, Kujur, Patel, Rabha, Devi, and Chakraborty