Cognomen Sibaji (Sibaji 
) , around the globe, is a rare family name. The cognomen Sibaji is habitual in Israel, where it is a very rare surname, and India, where it is an extremely rare surname. Predominantly, Sibaji is the forename as well as the last name.
Bag, Ghosh, Nayak, Mondal, Sarkar, Behera, Biswas, Biswal, Parida, Padhan, Mallick, Mahanta, Mohanty, Patnaik, Pradhan, Maharana, Banerjee, Dasgupta, Mahapatra, Mukherjee, Chowdhury, Pattnayak, Gupta, Dutta, Panda, Patra, Pal, Ray, Roy, Dey, Das, Saha, Sahu, Basu, Bose, Raut, Chatterjee, Rout, Giri, Jena, Naik, Malik, Majhi, Mitra, Singh, Sethy, Swain, Barik, Dash, and Chakraborty