Johanna Elisabeth of Schleswig-Holstein-Sonderburg was a German noblewoman born in 1620. She belonged to the House of Schleswig-Holstein-Sonderburg, a branch of the larger House of Schleswig-Holstein. Johanna Elisabeth was known for her marriage to Duke Christian of Saxe-Merseburg, which helped strengthen political alliances in the region. Throughout her life, Johanna Elisabeth played a role in the social and political dynamics of her time. She was part of the Thirty Years' War era, a significant conflict in Europe that affected many noble families. Her lineage and connections contributed to the historical landscape of German nobility.