Bertachar (or Berthachar) was a king of Thuringia from about 510 until about 525, co-ruling with his brothers Hermanfrid and Baderic.
[3] Frankish sources, such as Venantius Fortunatus, make the three brothers sons of King Bisinus.
They are sometimes considered as sons of Bisinus' wife Menia,[1] or else as sons of Basina, who is called a wife of Bisinus by the Frankish historian Gregory of Tours.
[4] Many scholars, however, reject Bisinus' marriage to Basina as ahistorical, leaving Menia as his only known wife.
[8] His daughter, Radegund, married the Frankish king Chlothar I and founded Holy Cross Abbey in Poitiers.