Richgard von Sponheim
Richgard of Sponheim, or Richardis (died 1151), was the wife of Rudolf I of Stade, Margrave of the Nordmark, and mother of Udo IV, Rudolf II, Margrave of the Nordmark, Archbishop Hartwig of Magdeburg, Lutgard of Salzwedel, and Richardis von Stade.