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1. Son of Frederick William who in 1701 became the first king of Prussia (1657-1713)
    
2. Holy Roman Emperor from 1152 to 1190; conceded supremacy to the pope; drowned leading the Third Crusade (1123-1190)
   - Frederick Barbarossa, Barbarossa

Type of: Holy Roman Emperor, king, male monarch, Rex

Part of: Hohenzollern

Encyclopedia: Frederick I, Duke of Anhalt Frederick I, Duke of Austria Frederick I, Count of Vaudemont Frederick I, Count of Vaudémont Frederick I, Duke of Brunswick-Lueneburg Frederick I, Duke of Lorraine Frederick I, Duke of Mantua Frederick I, Duke of Brunswick-Luneburg Frederick I, Duke of Brunswick-Lüneburg Frederick I, Burgrave of Nuremberg Frederick I, Count Palatine of the Rhine Frederick I Frederick I, Archbishop of Cologne Frederick I, Count of Altena Frederick I, Count of Lowenstein Frederick I, Count of Löwenstein Frederick I, Count of Berg-Altena Frederick I, Count of Loewenstein Frederick I, Holy Roman Emperor Frederick I, Landgrave of Hesse-Kassel Frederick I, Grand Duke of Baden Frederick I, Elector of Brandenburg Frederick I, Elector of Saxony Frederick I, Landgrave of Thuringia Frederick I, Margrave of Brandenburg Frederick I, Margrave of Brandenburg-Ansbach Frederick I, Margrave of Meissen Frederick I, Margrave of Baden Frederick I, the new Danish king Frederick I, Duke of Prussia Frederick I, Duke of Schleswig-Holstein Frederick I, Duke of Saxe-Altenburg Frederick I, Duke of Saxe-Hildburghausen Frederick I, Duke of Saxe-Gotha-Altenburg Frederick I, Duke of Swabia Frederick I, Duke of Württemberg Frederick I, Elector Palatine Frederick I, Duke of Wurttemberg Frederick I, Duke of Upper Lorraine Frederick I, Duke of Wuerttemberg