Family name Thavornwong (ถาวรวงศ์ 
, Thavornwong , ถาวรวงค์ ) , in the world, is a rare cognomen. The last name Thavornwong is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname. Very seldom, Thavornwong is the forename as well as the last name.