Family name Roongroj (Roongroj 
) , around the world, is a very rare last name. The cognomen Roongroj is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, Roongroj is the forename as well as the last name.
Kamta, Saengsastra, Suntornnon, Assaneesarntiwong, Chokngamwong, Pongsapich, Pimchaipong, Phutthiyawat, Phetkheaw, Jaroenvisuthiwong, Thitiponpun, Viriyachon, Pongsaparn, Rajchasanmuang, Jarusiripipat, Narathititham, Watthanaapisith, Suphannasing, Charusirisawad, Chaicharoen, Chumwuttiluck, Poolsawasdi, Jantarat, Bhidayasiri, Bulsombut, Srikureja, Zally, Sukhum, Champi, Boknoi, Rojkulpanichakul, Deemee, Malasai, Sritula, Srihera, Chaikan, Limthongthang, Chumpon, Koungyuttamongkol, Khaosut, Paimyossak, Pengjam, Phoogpan, Nailoes, Hemakom, Onmongcol, Manatpreeprem, Saenjarern, Boontos, and Thanasupchanchai