For over a millennium, the Kirat had inhabited the Kathmandu Valley, where they installed their own ruling dynasty. According to the history of Nepal, the Kirats ruled for about 1,225 years (800 BC–300 AD). Their reign had 29 kings. The Kirat population in the valley along with original Australoids and Austro-Asiatic speakers form the base for the later Newar population. As time passed, other Kirat groups, now known as Limbu, Rai, Yakkha and Sunuwar settled mostly in the Koshi region of present-day eastern Nepal and Sikkim, Darjeeling. The Limbu people have their own distinct form of Kirat Mundhum, known as Yuma Sammang or "Yumaism"; they venerate a mythological goddess called Tagera Ningwaphumang.