Mummolus (also spelled Mommolus or Mummulus), was a Gallo-Roman patrician and prefect who served Guntram, King of Burgundy, as a general in the 6th century.
He sabotaged the rebels' boats in an attempt to drown them in the Rhône, but Guntram Boso reached Avignon, where Mummolus was staying, and besieged it.
Guntram's nephew, Childebert II, sent down an army which relieved Avignon and rescued Mummolus.
Gregory of Tours accused Mummolus of subjecting many Franks who had hitherto been free of taxation.
During his wars against Chilperic, Mummolus had obtained the enmity of his queen Fredegunda, who accused him of responsibility for the death of her son Theodoric and of practising sorcery.