Nong Khai is called cast comes from the word "Nong Khai", which means "swamp direct location of the barracks", where the word is cast as Nongkhai, Nong Khai during King Rama 5, and renamed the town is Nong Khai since then.
Nong Khai is a distortion of the word "swamp camp", meaning that direct. "Swampy area at the barracks," which the camp was called Nong Khai is distorted during the reign of five and was renamed as Nong Khai town since then.