Answer:
yes Lohtamia are authentic rajput. Lohtamia derived from Lawtamia (gotra Bhardwaj ) subbranch of badgurjar one of the rajput 36 kul.Bargurjar is a suryavanshi clan descendant of eldest son of ram Lava.Lohtamia had moved from Lahore (lohkot ). According to kshtriya Kul Parichayika Some Raghuvansi kshtriya moved from Lohgadh state ( Maharastra ) and lived in Arrah& Balia &Chapra Dish.Due to Lohgadh they called as Lohthambh or Lohtamia Rajput. At Present day their have 35-40 villagws of lohtamia rajput in Arrah and Balia Dish. The commander of Shershah suri sri Pahad ji was belongs from Lohtamia Rajput. Lohtamih rajput fully supported to veer Kuwar Singh in first battle indepence war in India. Lohtamia rajput sri Viswanath Singh supported to Subhash chandra Bosh with his friend from Rajput Ragiment in Rangoon War. As a Sainik of Azad Hind Fouz sri Viswanath Singh was hang till death by British company.