Hermanfrid (also Hermanifrid or Hermanafrid; Latin: Hermenfredus, died 532) was the last independent king of the Thuringii in present-day Germany.
Baderic was overcome by the Franks and beheaded, but Hermanfrid refused to fulfill his obligations to Theuderic, which led to enmity between the two kings.
Hermanfrid managed to flee, but the Franks captured his niece Radegund (see Venantius Fortunatus, De excidio Thoringae) and his nephews.
Radegund was then forced to marry King Clotaire, while Hermanfrid's wife Amalaberga fled to the Ostrogoths with her children Amalafrid and Rodelinda.
The fall of the Thuringian dynasty became the subject of numerous epic treatments, the best known of which is in the Rerum gestarum saxonicarum libri tres by Widukind of Corvey, a Saxon foundation myth written in 967.