According to Indian folklore, Mordhwaj or Mordhwaja or Murddhawaja (Sanskrit: मोरध्वज) is an ancient king of the Mahabharata period, who is believed to have been blessed by Krishna.

[5][6] A new temple has also been built near the ancient fort on the bank of Saryu River in Aalapur tehsil of Ambedkar Nagar district of Uttar Pradesh.

[8][3] Mordhwaj established the Bageshwar Nath Shiv Temple at Arang in Raipur District of Chhattisgarh in the 11th century.

[11] The excavations, carried out at Mathurapurmor's Mordhwaj fort, which is locally known as Begam Kothi, located 15 kilometers from Kotdwara towards Najibabad, discovered antiques including terracotta, gold coins, potsherds decorated bricks and copper.

[14] There is another Mordhwaj Fort located on the bank of Saryu River in Aalapur tehsil of Ambedkar Nagar district of Uttar Pradesh.

It is believed in the region that the fort was established by King Mordhwaj in Chadipur Kala, situated at a distance of 10 yojanas from Ayodhya.