The Sulzbach line was related to the Palatinate-Neuburg line who were Electors Palatine. The
Elector of the Palatinate Charles III Philip failed to produce a legitimate male heir, as did his brothers. Joseph Charles, the eldest son of the Count Palatine of Sulzbach, was the heir apparent. On 2 May 1717 Joseph Charles married
Countess Palatine Elizabeth Augusta Sophie of Neuburg (1693–1728), the daughter of Charles III Philip, a match intended to unite the two lines and prevented another
succession war. However, all the sons fathered by the couple died in infancy and only three daughters survived. In 1728 Elizabeth Augusta died in childbirth and Joseph Charles died the following year in
Schloss Oggersheim. Therefore, the inheritance of Palatinate-Sulzbach and the eventual inheritance passed to Joseph Charles' brother
John Christian Joseph and his family. Nevertheless, their third daughter to survive infancy,
Maria Francisca of Sulzbach, would be a progenitor of the Bavarian royal line as the mother of
Maximilian I Joseph. Joseph Charles was buried in the
St. Michael's Church, Munich. ==Issue==