#Johanna Magdalene (b. Weissenfels, 17 March 1708 - d. Leipzig, 25 January 1760), married on 5 January 1730 to Ferdinand Kettler, Duke of Courland and Semigallia.
In addition to these terms, the treaty also included secret articles: therein, Frederick William I accepted Swedish claims to the Baltic coastal areas between Prussia and Swedish Livonia, namely Courland, Lithuania, Samogitia and Semigallia.