Charles Emmanuel IV May 24 1751-October 6 1819 was the Duke of Savoy and Piedmont and King of Sardinia from October 14 1796 to June 4 1802. For all hereditary titles, check Vittorio Amedeo III.
He married Clotilde Adelaide, sister of Louis XVI of France
Vittorio Amedeo III
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Vittorio Emanuele I