Cognomen Bithin (Bithin 
) , in all the world, is an extremely rare last name. The last name Bithin is characteristic of Philippines, where it is an extremely rare surname, and India. Much more prevalently, Bithin is the forename as well as the last name.
Sau, Kundu, Panja, Datta, Dutta, Ghosh, Mandal, Mondal, Mekdar, Sarkar, Samant, Biswas, Hyiran, Mahanta, Bairagi, Goswami, Majumdar, Banerjee, Karmakar, Talukdar, Mukherjee, Chowdhury, Bhasi, Basak, Barui, Sudhi, Bag, Pal, Raj, Ray, Roy, Deb, Dey, Das, Maji, Saha, Chatterjee, Shee, Seth, Bala, Basu, Babu, Bera, Bose, Paul, Jana, Manna, Mitra, Show, and Chakraborty