Janaka (Sanskrit: जनक, Khmer: Janak, Telugu: జనకుఁడు, Tamil: ஜனகன், Thai: ชนก (Chanok), Malay: Maharisi Kala) or Raja Janaka (राजा जनक, rājā janaka) were the kings of Videha Kingdom. Their capital was Mithila, which is believed to be present day Janakpur, Nepal. The most famous Janak was Seeradhwaj a vaishya king.
Read more about Janaka: Janaka in Ramayana, See Also