A prominent disciple of Vyasadeva.
It is mentioned in Devi Bhagavata, Skandha 1, that the main disciples of Vyasa were Asita, Devala, Vaisampayana, Sumantu, Jaimini, Paila and some others.
2) Other details.
(i) It was Vaisampayana who told the story of Bharata composed by Vyasa, to King Janamejaya.
(Maha-bharata Adi Parva, Chapter 1, Stanza 20).
(ii) Vaisampayana told Janamejaya the story of Bharata at the instruction of Vyasa.
(Maha-bharata Adi Parva, Chapter 60, Verse 22) .
(iii) Vaisampayana praised Mahabharata and spoke of its greatness.
(Maha-bharata. Adi Parva, Chapter 62, Stanza 12).
(iv) Once Vaisampayana was overpowered by ignorance, and he killed a Brahmin. It is mentioned in Maha-bharata, Anusasana Parva, Chapter 6, Stanza 36, that in spite of it he attained heaven.