Koliyas were part of ancient republic Kshatriyas who ruled over region spreading from modern day Maharajganj district of Uttar Pradesh till Terai belt of Nepal. It was a small republic of Buddha time and belonged to serpent worshipping aboriginal clans of India, thus also known as Nagvanshi. The community, though of aborigianl Australoid-Mongolid population, were upgraded to Kshatriya status by Samudragupta during period of Gupta Empire. If so, how come rulers of these areas became Koli? A stretched version of historical document by original author. Further, through external links, he purposely introduced ""Koli"" word as a substitute of historical "Koliya" word.