Friedrich Kettler
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Friedrich Kettler was Duke of Courland and Semigallia from 1587 to 1642.
Portrait after Johann Christian Hohl (based on a 17th century original), Bauskas Museum, Latvia
Wilhelm Kettler
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Wilhelm Kettler was the Duke of Courland, a Baltic German region in today's Latvia. He ruled the western Courland portion of the Duchy of Courland and Semigallia, while his brother Friedrich ruled the
