Chlothar I
In 584 or 585, one Gundowald claimed to be an illegitimate son of Chlothar I and proclaimed himself king, taking some major cities in southern Gaul, including Poitiers and Toulouse, which belonged to Gontrand. Gontrand marched against him, calling him nothing more than a miller's son named Ballomer. Gundowald fled to Comminges and Gontrand's army proceeded to besiege the citadel. He could not capture it, but did not need to: Gundowald's followers gave him over and he was executed.