Surname Ruamtham (Ruamtham 
) , worldwide, is a rare cognomen. The last name Ruamtham is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
Sata, Jaruwan, Jintana, Jiranan, Thavorn, Thitima, Tuspong, Wansiri, Salinlada, Supranee, Suprapha, Sutharat, Sutsawat, Kanokrat, Khamplaeng, Khwanjai, Pornphen, Pichittra, Pipatpron, Phatteera, Phakamas, Phawinee, Lumduan, Panuwat, Paritra, Kwanjai, Saman, Sumet, Srvas, Srves, Pikul, Lamai, Janya, Nukan, Marisa, Mintra, Rapeepat, Suphab, Chairj, Banyen, Pradub, Oranuch, Supakid, Sudarat, Charoon, Bunkong, Butsaba, Keerata, Sommai, and Denduang