Erchanger, Duke of Swabia

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Erchanger (or Erchangar) (c. 860/880 – 21 January 917) was the duke of Swabia from September 915 to his death. He was the son of Berthold I, count palatine of Swabia, who is sometimes called Erchanger as well, in which case the duke is Erchanger II. His mother was Gisela, daughter of Louis the German and his family is known as the Ahalolfinger.

He was originally a missus dominicus in Swabia. In 911, he allied with Bishop Solomon III of Constance due their common political goals. Erchanger was at the time striving for ever greater power in Swabia alongside Burchard I and Burchard II. He played a conspicuous part in the downfall of the elder Burchard, who was convicted of high treason and executed, in 911. With the fall of the Burchards, Erchanger and his younger brother Berthold were the most powerful counts in the tribe. In 913, Erchanger and King Conrad I of Germany fell out, but Erchanger married off his sister Cunigunda, whose husband, Luitpold, had just died, to the king. With this diplomatic marriage, Erchanger became the king's representative in Swabia. With this, his alliance with Bishop Solomon broke and the bishop opposed his rise. Seeing his income diminished by the bishop, Erchanger imprisoned Solomon in 914. Conrad opposed this and freed the bishop, exiling Erchanger.

Erchanger returned in 915 and was fighting alongside his nephew Arnulf of Bavaria and his old enemy Burchard II against the Magyars. Erchanger and Burchard then turned against Conrad. Defeating him at the Battle of Wahlwies in the Hegau, Erchanger is proclaimed duke. However, at a high court in Hohenaltheim in September 916, Erchanger was condemned to a monastery for offences against king and bishop. He was killed on the instructions of the king on 21 January 917.

Preceded by
Burchard I
Duke of Swabia
915–917
Succeeded by
Burchard II