Legendary account of kirati in Nepal

Nepal's very first recorded, though still legendary, history began with the Devkotas, who may have arrived from the west to the Kathmandu valley. Little is known about them, other than their deftness as sheep farmers and great fondness for carrying long knives. According to the Gopalavamsa chronicle, the Kiratas ruled for about 1225 years (800 BCE–300 CE), their reign had a total of 29 kings during that time. Their first king was Elam; also known as Yalambar, who is referenced in the epic Mahabharata. 
The 1st Kirata King Kushal laid the foundation of the Kirata dynasty after defeating the last ruler of the Abhira dynasty. When Kiraats occupied the valley, they made Matatirtha their capital. The Kirat kingdom during the rule of Yalambar extended to Tista in the East and Trisidi in the West. It is said Yalambar had gone to witness the battle of Mahabharata between the Pandavas and the Kauravas. He was so brave and powerful that Lord Krishna beheaded him prior to the battle suspecting he might fight for the Kauravas.
The 7th Kirata King 'Jitedasti
During the rule of the 7th Kirat King Jitedasti, Lord Gautam Buddha(BC 623-BC 543)  is said to have come to the valley with his several disciples and to have visited holy places of Swayambhu, Guheswari, etc., and to have preached his religious teaching. The Kiratas of the valley refused to follow his doctrine but welcomed Lord Buddha and his disciples.
The 14th Kirata King 'Sthunko
During the rule of the 14th Kirat King Sthunko, the Indian Emperor Ashoka is said to have come to the Kathmandu Valley with his daughter, princess Charumati. During his