Cognomen Chalermsan (Chalermsan 
) , all over the world, is a rare last name. The family name Chalermsan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
Sai, Natchanon, Piyamaporn, Chaowannee, Chanidapa, Ittiphat, Tanaphat, Choawannee, Chowannee, Ratchakrit, Yanyong, Sutassa, Sirapob, Noojhon, Noojohn, Nitima, Ukrit, Dusit, Kamol, Pavarit, and Phacharapan