Family name Ruengwit (Ruengwit 
) , throughout the world, is an extremely rare surname. The cognomen Ruengwit is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Ruengwit is the forename as well as the last name.
Sangrod, Jettanacharoenchai, Rattanapramot, Phetcharut, Bunjongrat, Charoenbulwiwat, Puengrasamee, Payungporn, Sittiwong, Sawangkeaw, Tongchaom, Potikasame, Khwanrit, Bunlueharn, Bubphan, Saejiam, Chamnankitsupat, and Watchalapong