Gustav Samuel Leopold (12 April 1670 – 17 September 1731) was the Count Palatine of Kleeburg from 1701 until 1731 and the Duke of Zweibrücken from 1718 until 1731.
He was the last reigning male member of the Kleeburg line of the House of Wittelsbach.
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Title
Gustav Samuel Leopold's title read as follows:
Gustav Samuel Leopold, by the Grace of God, Count Palatine of the Rhine, Duke in Bavaria, of Jülich, Cleves and Berg, Prince of Moers, Count of Veldenz, Sponheim, Mark, Ravensberg and Rixingen, as well as Lord of Ravenstein
Life
Gustavus Samuel Leopold was born at Stegeborg Castle near Söderköping in 1670 as the youngest son of Adolph John I, Count Palatine of Kleeburg. The siblings were reportedly badly treated by their parents, and in 1687, Gustav helped his sisters Catherine and Maria Elizabeth to escape from their parents to the protection of the Swedish royal court, which became a scandal in contemporary Sweden.
He succeeded his brother Adolph John II as Count Palatine of Kleeburg in 1701, and his cousin Charles XII, King of Sweden, as Duke of Zweibrücken in 1718. The king's death also made him one of the eligible candidates for the Swedish throne. From 1720 until 1725 he moved his residence to a palace, Zweibrücken Castle, built by Jonas Erikson Sundahl.