Swedish violin and viola player, born on August 9, 1946 in Arvika.
He studied two years with Manoug Parikian in London and four years with Endre Wolf. He played in the Swedish Radio Symphony Orchestra under Sergiu Celibidache for three years. He was then employed by the Gothenburg Symphony and was first concertmaster there from 1976 until his retirement in 2010. He has been a soloist with his own orchestra and many other symphony orchestras. Thorvaldsson was elected as a member of the Royal Academy of Music in 1996.