Berthar and his brothers Baderic and Hermanfrid succeeded their fatherBisinus to the rule over the Thuringians. After Hermanfrid defeatedBerthar in battle, he invited King Theuderic of Metz to help him defeatBaderic in return for half of the kingdom. When the Franks tookThuringia, King Chlotar I of Soissons took Radegund as his second wife.