Frederick II, Duke of Swabia
| Frederick II the One-Eyed | |
|---|---|
| Duke of Swabia | |
Duke Frederick, Chronica sancti Pantaleonis
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| Spouse(s) |
Judith of Bavaria Agnes of Saarbrücken |
| Noble family | Hohenstaufen |
| Father | Frederick I, Duke of Swabia |
| Mother | Agnes of Germany |
| Born | 1090 |
| Died | 6 April 1147 Alzey, Rhenish Franconia |
| Buried | Walburg Abbey |
Frederick II (1090 – 6 April 1147), called the One-Eyed, 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.
Frederick II was the eldest son of Duke Frederick I of Swabia and his wife Agnes of Waiblingen, a daughter of the Salian emperor Henry IV. He succeeded his father in 1105 and together with his brother Conrad continued the extension and consolidation of the Hohenstaufen estates. Frederick had numerous castles erected along the Rhine river and in the Alsace region.
The Hohenstaufen brothers supported King Henry V in the conflict with his father Emperor Henry IV; Frederick also accompanied him on his campaign against King Coloman of Hungary in 1108. In 1110 he and Henry V embarked on an expedition to Italy, where in Rome Henry enforced his coronation by Pope Paschal II. In turn, the emperor appointed Conrad Duke of Franconia and both brothers German regents when he left for his second Italian campaign in 1116. On the other hand, the rise of the Hohenstaufens began to upset rivalling princes like Archbishop Adalbert of Mainz, who loathed the supporters of Henry V.
About 1120 Frederick married Judith, a daughter of Duke Henry IX of Bavaria and member of the powerful House of Welf. Their first son Frederick was born in 1122.
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