Bengt Jönsson Oxenstierna, (1390s-1450) Swedish statesman and co-regent of Sweden, under the Kalmar Union, from January to June of 1448, together with his brother Nils Jönsson Oxenstierna. Member of the Privy Council of Sweden from 1435, and Lord Justice of Uplandia in 1439. Dubbed as knight by King Christopher of Bavaria following his coronation in 1441, and Master of the Royal Court from the same year.