Its etymology is rumored to be that at one time there was a large reed forest in the vicinity of the area. The reed was sweet, and the name of the village came to Mithabon (মিঠাবন sweet forest) which was corrupted to Mithamon and later Mithamain/Mithamoin in the local dialect.
The etymology of this term is unclear, but it is believed to have originated from a nearby reed forest that was renowned for its sweet reeds. The village's name, Mithabon (মিঠাবন sweet forest), eventually became corrupted into Mithamon and Mithamain/Mithamoin.