Cognomen Tuangsit (Tuangsit 
) , globally, is an extremely rare family name. Much more prevalently, Tuangsit is the forename as well as the last name.
Aidlee, Phadee, Tintan, Kirtmee, Pechsuk, Upamana, Chunwaree, Boongthong, Ramyothin, Tongsiri, Sittisuntorn, Pratinsukampai, Phoomisittiporn, Rungseriruch, Sunthornpinij, and Pongsirikorn