Yajnavalkya (Devanagari: याज्ञवल्क्य) of Mithila was a legendary sage of Vedic India,credited with the authorship of the Shatapatha Brahmana (including the Brihadaranyaka Upanishad), besides the Yoga Yajnavalkya and the Yājñavalkya Smṛti.He is also a major figure in the Upanishads.