Wie trouwde met George Willem van Brunswijk-Lüneburg?

George Willem van Brunswijk-Lüneburg (Herzberg, 26 januari 1624 — Wienhausen, 28 augustus 1705) was van 1648 tot 1665 hertog van Brunswijk-Calenberg en van 1665 tot aan zijn dood hertog van Brunswijk-Lüneburg. Hij behoorde tot het Nieuwere Huis Lüneburg.

Éléonore Desmier d'Olbreuse (3, 7 or 9 January 1639 – 5 February 1722), was a French noblewoman, who became first the mistress and later wife of George William of Brunswick, Duke of Lauenburg and Prince of Celle. She was the mother of Sophia Dorothea of Celle, who was the wife of George I of Great Britain. Thus she was the maternal grandmother of George II.