George William, Duke of Brunswick-Lüneburg (d. 1705)
George William German: Georg Wilhelm (26 January 1624 – 28 August 1705) was the first Welf Duke of Lauenburg after its occupation in 1689. From 1648 to 1665, he was the ruler of the Principality of Calenberg as an appanage from his eldest brother, Christian Louis, Prince of Luneburg. When he inherited Luneburg on the latter's death in 1665, he gave Calenberg to his younger brother, John Frederick.

Nevertheless, he only kept the sub-division of Celle, giving the rest of Luneburg to their youngest brother Ernest Augustus, whose son, George Ludwig (future King of Great Britain), inherited Saxe-Lauenburg and Celle from George William. His only daughter, Sophia Dorothea of Celle, was George Ludwig's wife.