Background
Sophia Wilhelmina was the eldest daughter of John Ernest IV, Duke of Saxe-Coburg-Saalfeld (1658–1729) from his second marriage to Johanna Charlotte (1644–1699), daughter of Josias II, Count of Waldeck-Wildungen.
Sophia Wilhelmina was the eldest daughter of John Ernest IV, Duke of Saxe-Coburg-Saalfeld (1658–1729) from his second marriage to Johanna Charlotte (1644–1699), daughter of Josias II, Count of Waldeck-Wildungen.
Sophia Wilhelmina"s half-brother, Christian Ernest II, supported this development.