Family name Roumsuk (Roumsuk 
) , worldwide, is a rare surname. The last name Roumsuk is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
Den, Kingkarn, Lakkhana, Tanapath, Supawadee, Chanokporn, Cholticha, Kingsuda, Kanokporn, Kornravee, Phakwalan, Nattapong, Nattakrit, Nuttakrit, Yaowamarn, Kanyaphak, Kaewaree, Sittisak, Udomsak, Lui, Saman, Sawas, Supuk, Araya, Naren, Adisak, Pemika, Prasit, Jamlong, Jirapat, Jirayut, Jirayud, Nongnut, Ittidach, Channarong, and Phatcharinthon