William the Younger, Duke of Brunswick

William
William
	Portrait by an unidentified artist, 1622
Duke of Brunswick-Lüneburg; Prince of Lüneburg
Reign	1559 – 20 August 1592
Predecessor	Ernest I
Successor	Ernest II
Born	4 July 1535
Died	20 August 1592 (aged 57)
Spouse	Dorothea of Denmark (m. 1561)
Issue	Sophia, Margravine of Brandenburg-Ansbach; Ernest II, Duke of Brunswick-Lüneburg; Elisabeth, Countess of Hohenlohe-Langenburg; Christian, Duke of Brunswick-Lüneburg; Augustus I, Duke of Brunswick-Lüneburg; Dorothea, Countess Palatine of Zweibrücken-Birkenfeld; Clara, Countess of Schwarzburg-Frankenhausen; Anne Ursula of Brunswick-Lüneburg; Margaret, Duchess of Saxe-Coburg; Frederick IV, Duke of Brunswick-Lüneburg; Marie of Brunswick-Lüneburg; Magnus of Brunswick-Lüneburg; George, Duke of Brunswick-Lüneburg; John of Brunswick-Lüneburg; Sybille, Duchess of Brunswick-Lüneburg;
House	Welf
Father	Ernest I, Duke of Brunswick-Lüneburg
Mother	Sophia of Mecklenburg-Schwerin

William (4 July 1535 – 20 August 1592), called William the Younger (German: Wilhelm der Jüngere), was Duke of Brunswick-Lüneburg and Prince of Lüneburg from 1559 until his death. Until 1569, he ruled together with his brother, Henry of Dannenberg.