Bjoernstjerna (byern'-sher-na), Magnus. Born in 1779. Swedish general and diplomatist, served in the Finnish War. In 1809 was sent on a mission to France and, in 1812, arranged for the sale of Guadeloupe. He fought in the Danish War, and assisted at the negotiations which brought about peace with the transference of Norway to Sweden. In 1828 he was appointed minister in London. He left several works on political and fiscal matters. Died 1847.