Shiva Simha Singh

Shiva Simha Singh was the King of Oiniwar dynasty in Mithila. He is also known as Sivasimha. He was very handsome and highly intelligent, so he was also called as Rūpanārāyana. He was the King of Mithila. He declared himself independent and stopped paying taxes to Jaunpur Sultanate. Due to his decision to challenge the authority of the Sharqi empire, Ibrahim Shah Sharqi attacked Mithila but was defeated.

Mithila, Bengal and Arakanese accounts say that brahmin ruler Sivasimha helped another Brahmin ruler, and his friend Raja Ganesha of Bengal, in defeating the Jaunpur Sultanate in Bengal-Jaunpur conflict. Ganesha had previously freed Bengal from Muslim occupation.