Due to close relationsships to the Langobardian aristocracy, the Baiuvarii became a powerful people, their territory reaching from the river Lech (Augsburg) to Vienna, from the Alps to the border of Thuringia, covering almost the whole area of today's German federal state Bavaria and Austria.
The ducal clan of the Baiuvarii, the Agilofingians, ruled until 788, when duke Tassilo III, who had defied the Frankish influence on Bavaria, was deposed by Charlemagne.