Cognomen Tongsang (Tongsang 
) , in the world, is a rare surname. The last name Tongsang is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Tongsang is the forename as well as the last name.
Manoo, Thayakorn, Pornchita, Panomporn, Patompong, Paranchai, Chanansikan, Sitthisak, Yaowaluk, Nuttawut, Tongpiew, Pongthep, Chanream, Tossaphon, Supachai, Thitima, Panoporn, Aareeya, Auksorn, Areeporn, Wanida, Noppon, Dwight, Derric, Phisit, Pichet, Somjai, Savitree, and Kanlayanee