William the Victorious, Duke of Brunswick-Lüneburg

William the Victorious
Duke of Brunswick-Lüneburg
Bornc.1392
Died25 July 1482 (Aged 90)
BuriedBrunswick Cathedral
Noble familyHouse of Welf
Spouse(s)Cecilia of Brandenburg
Matilda of Holstein-Schauenburg
IssueFrederick III the Turbulent
William IV the Younger
FatherHenry the Mild, Duke of Brunswick-Lüneburg
MotherSophie of Pomerania

William I KG (c. 1392 – 25 July 1482), called the Victorious (German: Wilhelm der Siegreiche), a member of the House of Welf, was Duke of Brunswick-Lüneburg. He was reigning Prince of Lüneburg from 1416 to 1428 and of Brunswick-Wolfenbüttel from 1428 to 1432, counted either as William III or William IV. From 1432, he ruled over the newly established Principality of Calenberg, from 1463 also over the Principality of Göttingen. In 1473, he stepped down in favour of his sons, to assume the rule in Brunswick-Wolfenbüttel.