Friedrich II Duke of Swabia

✓ Friedrich II 'der Einaugige' von Staufen, Duke of Swabia (1090-Alzey Apr 1147), son of Friedrich I by Agnes, da. of Emperor Henry IV (Tabula consanguinitatis: 'ducem Fridericum, qui Stophen condidit' and 'filia regis Heinrici'); regent of Germany 1116; m. (1) Judith of Bavaria (Welf), mother of the Emperor Frederick Barbarossa and of Bertha (Judith), Duchess of Lorraine; (2) [1132/33] Agnes von Saarbrucken. Source: Medieval Lands (fmg.ac, Cawley), read 2 Nov 2026: 'Swabia, Dukes'. [DIRECT ANCESTOR OF THE COMPILER: flag added 2 Nov 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]