Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vaid is a Brahmin clan from the Punjab, one of the seven clans of the Mohyals. The words Vaid and Rajvaid are particularly used to denote medical professionals in Indian history. The gotra or founding lineage of the Vaids is Dhanvantari. In the story of the Kurma Avatara mentioned in the Bhagavata Purana, during the Samudra manthan, fourteen ratnas emerged as a result of the churning of the oceans by the devas. The last founder to emerge was Dhanvantari, carrying Amrita, the elixir of life. He was a genius in medicine who invented Ayurveda and classified it into eight parts. Dhanvantari is one of the twenty-five avatars of Vishnu.