"Marie Elisabeth of Brunswick-Wolfenbüttel (7 January 1638 - 15 February 1687), was a German noblewoman member of the House of Welf and by her two marriages Duchess of Saxe-Eisenach and Saxe-Coburg.
Born in Brunswick, she was the second of the three children of Augustus the Younger, Duke of Brunswick-Lüneburg and his third wife, Duchess Elisabeth Sophie of Mecklenburg. Marie Elisabeth and her older brother Ferdinand Albert are the only surviving children of their parents´ marriage. In addition, they had seven older half-siblings from Duke Augustus´ two previous marriages, of whom only four survive adulthood: Rudolph Augustus, Sibylle Ursula (by marriage Duchess of Holstein-Glücksburg), Clara Augusta (by marriage Duchess of Württemberg-Neustadt) and Anthony Ulrich, all born from Augustus´ second marriage with Dorothea of Anhalt-Zerbst." - (en.wikipedia.org 29.10.2020)