Ragnachar or Ragnarius (died 509) was a Frankish petty king (regulus) who ruled from Cambrai. According to Gregory of Tours, Ragnachar "was so unrestrained in his wantonness that he scarcely had mercy for his own near relatives". According to the Gesta episcoporum Cameracensium, Clovis I and Ragnachar were related through Clovis's mother, Basina, a Thuringian princess. When the traitorous leudes complained of having received false gold, Clovis told them that that was their payment for betraying their lord, and that they should be grateful they still had their lives.