Buddha belonged to the Sakya clan. The Sakya clan was one of the many clans or families in ancient India. Buddha`s birth name was Siddhartha Gautama, and he was born into the Sakya clan in present-day Nepal. The Sakya clan was part of the Kshatriya caste, which was the warrior or ruling caste in ancient India. The Sakya clan had their own distinct customs, traditions, and governance. Buddha`s affiliation with the Sakya clan is significant because his teachings and philosophy, which later formed the foundation of Buddhism, were deeply influenced by his upbringing and experiences within the Sakya community. It is important to note that the other options given in the question, namely Gnathrika, Mauiya, and Kuru, are not correct.