In the past, the Dong Phaya Yen was named Dong Phaya Fai. The Dong Phaya Fai has been called by the locals means the forest is full of malarial malaria. And this forest is a forest full of dangers and frightening journey that will take two days to travel and travel by foot and wagon only. Then he changed the name Dong Phaya Yen. The reign of the first to the second request to change the days after he went to visit the train. And have faith that if I do not make people panic. Despite the name change, many people still called the Dong Phaya Fai same. After building a railway and a road matchup. From the region to the east. Dong Phaya Fai was cut off immediately. People are starting to migrate into. Then nag forest farm. Especially Farm Chokchai, Pak Chong district of Nakhon Ratchasima. Since then, Woods has been fierce Dong Phaya Fai. Became the forest to remain silent. Dong Phaya Yen completely since then.