Of Charles Philip's six children (five daughters and one stillborn son), Elisabeth Auguste was the only one to reach adulthood.

She was the third daughter of Charles III Philip, then Count Palatine of Neuburg, and his first wife, Ludwika Karolina Radziwiłł.

Joseph Charles, the eldest son of the Count Palatine of Sulzbach, was the clear heir.

The sons of the union would be the indisputable heirs of the Electorate of the Palatinate, preventing another succession war.

The inheritance of the Electorate of the Palatinate passed to her husband's brother, John Christian Joseph's family.