Cognomen Rattanasang (Rattanasang 
, รัตนแสง ) , in the world, is a rare last name. The last name Rattanasang is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname.
Sarun, Pannaray, Pakkaporn, Rujiphas, Jiraphat, Nuttapat, Nuttinan, Wanasart, Supawadee, Anchanaporn, Ratchanee, Thathanat, Theerawat, Navapadol, Chatchanok, Kotchamonpan, Krittaporn, Phenprapha, Kawaleekamol, Chatchai, Sirichai, Sirinate, Kanya, Wasna, Wiwat, Anurak, Buapan, Kumpol, Pranee, Tabtim, Napatsadol, Niyaporn, Chairat, Chaiyut, Boonlom, Pongsak, Tanapon, Titinat, Nongyao, Singsamut, Warada, and Prasartporn