Rudolph Augustus was duke of Brunswick-Lüneburg

Brunswick-Lüneburg

The Duchy of Brunswick-Lüneburg , or more properly Duchy of Brunswick and Lüneburg, was an historical ducal state from the late Middle Ages until the late Early Modern era within the North-Western domains of the Holy Roman Empire of the German Nation, in what is now northern Germany...

 from 1666 until his death. He ruled over the Wolfenbüttel subdivision of the duchy. In 1685, he made his younger brother Anthony Ulrich his co-regent.

Rudolph Augustus was the son of Augustus the Younger, Duke of Brunswick-Lüneburg

Augustus the Younger, Duke of Brunswick-Lüneburg

Augustus of Brunswick-Lüneburg , called the Younger, was duke of Brunswick-Lüneburg. In the estate division of the House of Welf of 1635, he received the Principality of Wolfenbüttel....

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Children

Rudolph Augustus married Christine Elizabeth, daughter of Albert Frederick, Count of Barby-Muhlingen. They had the following children that reached adulthood:

• Dorothea Sophia (1653-1722), married John Adolphus, Duke of Schleswig-Holstein-Sonderburg-Plön
• Christine Sophia (1654-1695), married Augustus William, Duke of Brunswick-Lüneburg
  Augustus William, Duke of Brunswick-Lüneburg
  Augustus William, Duke of Brunswick-Lüneburg ruled over the Wolfenbüttel subdivision of the duchy from 1714 until his death....