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Judith of Bavaria, Duchess of Swabia (19 May 1100 – 27 August 1130) was a duchess of Swabia by marriage to Frederick II, Duke of Swabia. She was the mother of Frederick I, Holy Roman Emperor, also known as "Barbarossa".

Frederick II (German: Friedrich II, 1090 – 6 April 1147), called the One-Eyed (der Einäugige), was Duke of Swabia from 1105 until his death, the second from the Hohenstaufen dynasty. His younger brother Conrad was elected King of the Romans in 1138.