Surname Sipen (Sipen 
) , around the world, is a very rare cognomen. The cognomen Sipen is habitual in Malaysia, where it is a rare surname, Brazil, where it is an extremely rare surname, and the United States. More prevalently, Sipen is the forename as well as the last name.
Mal, Udjah, Mandal, Mahato, Mondal, Sarkar, Sharma, Singha, Barman, Lepcha, Lohara, Hajara, Kalindi, Pradhan, Rajoyar, Rapeemanus, Haladar, Zakaria, Utairat, Karmakar, Yadav, Oraon, Orang, Nayak, Bag, Ray, Rai, Roy, Das, Let, Sing, Paul, Tudu, Kejariwal, Orao, Mardi, Malik, Murmu, Singh, Bauri, Konai, Konra, Kumar, Pahan, Urao, and Debsharma