Margaret Leijonhufvud, queen of Gustav I of Sweden (d. 1551)
Margaret Leijonhufvud (née Margareta Eriksdotter; 1 January 1516 – 26 August 1551) was Queen of Sweden from 1536 to 1551 by marriage to King Gustav I. She played a political role as the advisor of, and the intermediary to, her spouse the King.