Kanva was an ancient Hindu rishi of the Treta yuga, to whom some of the hymns of the Rig Veda are ascribed. He was called a son of Ghora and one of the Angirasas. He is sometimes included in the list of the seven sages (the Saptarishis).
Parashara was a maharshi and the author of many ancient Indian texts. He is accredited as the author of the first Purana, the Vishnu Purana, before his son Vyasa wrote it in its present form. He was the grandson of Vasishtha, the son of Śakti Maharshi, and the father of Vyasa. He is the third member of the Rsi Paramparā of the Advaita Guru Paramparā.
Ved Vyasa is the most important rishi in the Hindu pantheon of religions, for he is the one who compiled the Vedas. He is also the author of the Hindu epic Mahabharata and the important characters in many Puranas. Vyasa (literally “Compiler”) is a central and revered figure in most Hindu traditions. He is also sometimes called Veda Vyāsa “the one who classified the Vedas“) or Krishna Dvaipāyana (referring to his dark complexion and birthplace).