Gautama Buddha , also known as Siddhārtha Gautama , Shakyamuni Buddha , or simply the Buddha, after the title of Buddha, was an ascetic and sage, on whose teachings Buddhism was founded. He is believed to have lived and taught mostly in the eastern part of ancient India sometime between the 6th and 4th centuries BCE.
Swami Vivekananda , born Narendranath Datta , was an Indian Hindu monk, a chief disciple of the 19th-century Indian mystic Ramakrishna. He was a key figure in the introduction of the Indian philosophies of Vedanta and Yoga to the Western world and is credited with raising interfaith awareness, bringing Hinduism to the status of a major world religion during the late 19th century. He was a major force in the revival of Hinduism in India, and contributed to the concept of nationalism in colonial India. Vivekananda founded the Ramakrishna Math and the Ramakrishna Mission. He is perhaps best known for his speech which began, "Sisters and brothers of America ...," in which he introduced Hinduism at the Parliament of the World's Religions in Chicago in 1893.
Sivananda Saraswati was a Hindu spiritual teacher and a proponent of Yoga and Vedanta. Sivananda was born Kuppuswami in Pattamadai, in the Tirunelveli district of Tamil Nadu. He studied medicine and served in British Malaya as a physician for several years before taking up monasticism. He lived most of his life near Muni Ki Reti, Rishikesh.