Frederick I, Duke of Lorraine

Frederick I, called Ferry (c. 1143–1206), was the second son of Matthias I and Judith of Swabia. Favoured by his mother for the succession, he received Bitche from his elder brother Simon II in 1176, but revolted against him.

After three years of war, the Treaty of Ribemont in 1179 gave him the German-speaking northern half of Lorraine, while Simon kept the south.

When Simon abdicated to a monastery in 1205, Frederick inherited the whole duchy, but ruled barely a year before dying in 1206. His son Frederick II, by Ludmilla of Poland, succeeded him.