According to (Raychaudhari-1972) ‘Shakya’ was a ‘Janapad’ (district) of ancient India in the first century BC. In Buddhist scriptures, ‘Shakya’ is said to belong mainly to the Gautam tribe in the foothills of the Himalayas there was an ancient kingdom of the Shakyas whose capital was Kapilvastu. The famous person of Shakya dynasty was Shakyamuni Buddha or Gautam Buddha. He can be known as Shakyamuni or Shakamuni in ‘Pali’ language. After the massacre of the Shakyas at Kapilbastu by Biruddak, the surviving Shakyas hid in the hills north of Kapilbastu. After informing about the Barkhabas Bihar (Monastries) built by Buddhist monks at Sankhu in Kathmandu during the reign of King Kirat,Jitedasti. The Shakyas who were hiding like this started living in Bihar as refugees. Pali is the religious language of this community All scriptures and deeds are governed by the Mantras and Sutras of Pali. According to the Gautam Gotra (Clan) introduction; (Law-1973 and Thapar-1978), Lord Gautam Buddha was born from the womb of Mayadevi as the son of King Shuddodhan of Kapilbastu, Tilaurakot about 2600 years before today. He also had caste, religion, clan, and tribe. The national religion of that state was Sanatan Dharma Hindu. King Shuddhodhan was a Hindu Sanatan Dharma based on Veda. Siddhartha Gautama Buddha was a Siddha man with unparalleled thought power, devotion and asceticism. The thought awakened in him and his thoughts towards the world of life eventually turned into Buddhism. Seize the rise and fall of civilization was in the period of Gautam Budda. According to Historian Pro. Dr. Ram Prasad Upadhyaya, as soon as he was born, Siddhartha Gautama walked seven steps to the north and said, "I have been reborn on this earth for salvation. This will be my last birth and I will not be born again. " Were said thus, in the Shakya dynasty, Krakuchhand and Kanakamuni are the main men who attained divinity before Siddhartha. After the end of state power from the invasion of Biruddak, the surviving Shakya dynasties fled to different parts of the country and entered Kathmandu as refugees during the reign of Kirat King Jitedasti. According to (Sharma-2017) ‘Shakya’ is a surname under the Newar community. Lord Gautam Buddha is also believed to be of Shakya descent. When human settlement started in Kathmandu Valley, human civilization had already developed in India and China. Historians are of the opinion that at that time, due to the influence and association of the North- South movement of Dravidians, Aryans, Huns and Mongols, many ethnic groups such as Nag, Yaksha, Gandharva, Kirat, Khas and Tharu developed in Nepal. The influence and spread of ethnic development also affected religion and culture. According to the history of the origin and development of the Shakya caste, it has been confirmed that Gautama Buddha belongs to the Shakya clan and that he is a native of the Mongolian Terai region of the Tharu caste. Due to cultural differences, the Shakya caste was initiated into the Newar community Therefore, both Shakya and Tharu castes are descendants of Gautam Buddha. Newar society is not formed based on one caste, race, religion, culture. "Newar" name is synonymous with Nepal. According to (Shreshta-2062), Nepali religion and Nepali culture, which embraced Nepali nationality in a fundamental way, 1. Vedic Tantra Shakta Sampradaya (Sect) 2. Buddhist Tantra Shakta Smpradaya (Sect) and 3. There are three ways to categorize a variety of outbursts. Within the Newar Sampradaya (Sect), Buddhism is different from Shakya Buddhism, Tibetan Tamang, Gurung, Magar, Buddhism, rites, and cultures, while Hinduism, which is Vedic or Hindu Newar, is also different from Khas, Brahmin, Madhesi or Hindustani. (Samrakshyak 2057) based on religion, according to the promise of the Newar community. The community can be divided into two by Hindu and Baudda. Sixteen rites are performed in Newar Hindus and ten rites are performed in Buddhism. Apart from these, other traditional rites like birthday and basic rites like Janko, Rathrohan (Old Pasni) and Nyanhu performed on the seventh day of death etc.