Family name Roengsak (Roengsak 
) , in the entire world, is an extremely rare surname. The last name Roengsak is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Roengsak is the forename as well as the last name.
Suksom, Kaewsaard, Prapaswong, Jarungsrisan, Tharanuvej, Thongkaew, Wangpitak, Wongsamai, Mahakunawan, Sukapunnapan, Chaikhamdaeng, Cartwright, Kaewkrajok, Khamsophar, Khongthong, Petcharanun, Vichitkunakorn, Worasetthasak, Siriprasert, Sirisongkram, Leetanaporn, Mongkhonkarun, Chonkhanan, Chankasem, Nuipakchong, Nangkaew, Jaitum, Hroodkong, Chonduang, Chuniad, Khanpech, Jaitham, Tapsonbut, Nawarat, Udomset, Mungsawat, Charoenrattawong, Saowapun, Sorisongkram, Phomklad, Phuthong, Phethastrakul, Loedchusinwong, Jaroonaek, Jitjumnong, Tapsombut, Thatwisai, Tulathimutte, Sukjitpinyo, and Patthanathammarat