Eléonore Desmier d'Olbreuse

She was the wife of the Duke of Brunswick-Lunebourg-Zell, Elector of Hanover. In 1685, she welcomed into her duchy all the Protestant nobility of Poitiers who were under threat. Through intermarriage, the blood of the D'Olbreuse family is present in 17 European dynasties, hence its nickname of grandmother of Europe. There is a genealogical relationship with the Mitterrand family.