Family name Tongam (Tongam 
) , in the world, is a rare cognomen. The cognomen Tongam is habitual in Thailand, where it is a rare surname, Indonesia, where it is a very rare surname, and India, where it is an extremely rare surname. More frequently, Tongam is the forename as well as the last name.
Ado, Nadeak, Nyicyor, Silaban, Siregar, Sitorus, Siahaan, Pardede, Wangham, Sitinjak, Sianturi, Sibarani, Pasaribu, Tambunan, Manullang, Sinambela, Silitonga, Sihombing, Aritonang, Panggabean, Tampubolon, Nainggolan, Tobing, Karcho, Sihite, Sinaga, Ete, Ori, Uli, Sora, Basa, Raja, Rina, Riba, Rime, Jini, Simanjuntak, Basar, Kamki, Kakki, Potom, Poyom, Purba, David, Nomuk, Erwin, Marbun, Manalu, Bagra, and Pangaribuan