Arnold Joost van Keppel, 1st Earl of Albemarle, KG, and lord of De Voorst in Guelders, was a Dutch military leader who fought for King William III of England and became the first Earl of Albemarle. He was the son of Oswald van Keppel and his wife Anna Geertruid van Lintelo. De Voorst is a large country house near Zutphen, financed by William III, and not unlike the royal palace Het Loo in Apeldoorn.