Family name Debayan (Debayan 
) , all around the world, is a very rare surname. The cognomen Debayan is habitual in India, where it is an extremely rare surname, and the United States. Predominantly, Debayan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Debayan | India, Singapore, Germany, Malaysia, United States |
De, Mondal, Sarkar, Chanda, Bagchi, Biswas, Halder, Samanta, Ganguly, Goswami, Majumder, Majumdar, Sengupta, Banerjee, Pramanik, Dasgupta, Mukherjee, Choudhury, Chowdhury, Chatterjee, Chakraborty, Bhattacharya, Mandal, Nandi, Ghosh, Gupta, Sen, Kar, Pal, Ray, Roy, Deb, Dey, Das, Saha, Basu, Bhattacharyya, Bose, Dhar, Guha, Nath, Maity, Mitra, Sinha, Banik, Kundu, Datta, Dutta, Paul, and Bhattacharjee