Family name Ritam (Ritam 
) , globally, is a rare last name. The surname Ritam is habitual in Indonesia, where it is a very rare surname, Malaysia, and India, where it is an extremely rare surname. Much more frequently, Ritam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ritam | Canada, United States, India, Indonesia, Malaysia |
De, Mondal, Mishra, Sarkar, Sharma, Biswas, Kumari, Halder, Mallick, Debnath, Ganguly, Majumder, Majumdar, Sengupta, Banerjee, Bhowmick, Karmakar, Dasgupta, Mukherjee, Chowdhury, Chatterjee, Chakraborty, Mandal, Nandy, Nandi, Ghosh, Sen, Pal, Ray, Roy, Dey, Das, Saha, Basu, Bera, Bose, Bhattacharya, Paul, Jana, Maity, Mitra, Singh, Sinha, Kundu, Kumar, Priya, Dutta, Gupta, Devi, and Bhattacharjee