The early presence of Buddhism in this region is said to have come via the settlement of Oddiyana, where Tantric Buddhism flourished under Indrabhuti, the king of Swat in the early eighth century and one of the original Siddhas. However, there is an old and well-known scholarly dispute as to whether Oddiyana was located in the Swat Valley of northwestern Pakistan, the eastern Indian state of Odisha, or somewhere else. Padmasambhava (flourished eighth century AD), the semi-legendary Indian Buddhist mystic who introduced Tantric Buddhism to Tibet was, according to tradition, native to Oddiyana. He is revered as the second Buddha in Tibet, and is said to have been the son of Indrabhuti. Lakshminkaradevi, Indrabhuti's sister, is also said to have been an accomplished Siddha in the ninth century AD.