Argengau

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The map of the Duchy of Swabia shows the Argengau , northeast of Lake Constance

The Argengau was a Carolingian county on the northeastern shore of Lake Constance in the area of present-day states of Bavaria and Baden-Wuerttemberg . The name-giving river Argen flows through the area .

Documents from the 8th and 9th centuries show that the following localities were assigned to the Argengau: Tettnang , Langenargen , Laimnau , Apflau , Haslach . Neighboring districts included the Hegau , the Linzgau and the Schussengau , the latter possibly only being a lower part of the Linzgau.

The earliest known count in the Argengau is Ruthard , who is considered the progenitor of the Welfs (769). From 783 Ruadbert, possibly a great-grandson of the Alemanni Duke Gotfrid , is documented as Count des Argengau. His nephew Udalrich I. (Oadalrîh I.) von der Udalrichingen , brother-in-law of Charlemagne , followed him. In 807 his son Rodbert (Hroadberht II.) Was mentioned in a document, who was replaced around 824 by a Count Ruachar of unknown origin. Ludwig the Pious gave the county to his brother-in-law, the Guelph Konrad I. His son, Welf II , lost the confidence of Ludwig the German when his brothers sided with Charles the Bald . Ludwig then set Udalrich III. (a descendant of Udalrich I.). His son Udalrich IV fell out of favor with Arnulf of Carinthia and lost the count's right around 890, at least temporarily. At least the Ulriche , the Udalrichinger counts of Bregenz (Ulrich IX., † before 1079, Count of Bregenz, Count im Argengau and Nibelgau ) can be found in the area in the middle 11th century , and after these in the middle 12th century the Montfort that here with the line Montfort-Tettnang formed a principal lines.

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