Johannetta of Sayn-Wittgenstein German princess (1632-1701) (1632–1701) Parents Louise Juliane of Erbach Ernest of Sayn-Wittgenstein Children Ernst Gustav von Sachsen-Eisenach John George II, Duke of Saxe-Eisenach Maximilian Heinrich von Sachsen-Eisenach Luise von Sachsen-Eisenach Friederike Elisabeth of Saxe-Eisenach Princess Eleonore Erdmuthe of Saxe-Eisenach John William III of Saxe-Eisenach Friedrich August von Sachsen-Eisenach Siblings Ernestine of Sayn-Wittgenstein Partners John George I, Duke of Saxe-Eisenach John of Hesse-Braubach