Charles V, Karl V. Leopold, (Charles Léopold Nicolas Sixte; 3 April 1643 – 18 April 1690), son of Nicolas François, Duke of Lorraine, and Claude Françoise de Lorraine. Karl Leopold was born in Vienna and became the brother in law of Emperor Leopold and son in law of emperor Ferdinand III. He was a second cousin once removed of his contemporary Louis XIV through the king's grandmother Marie de' Medici.From a long established family of Lothringen, who had to take refuge from the forces of France. However, he managed to become the titular Duke of Lorraine in 1675 at a time when Lorraine was occupied by France. Since 1663 he had been in imperial Habsburg service and had a very notable military career. In 1675 he became imperial generalissimo.