Haki

Haki, Hake (Old Norse: [ˈhɑke]), Haco or Aki, the brother of Hagbard, was a famous Scandinavian sea-king, in Norse mythology. He is mentioned in the 12th century Gesta Danorum and Chronicon Lethrense, and in 13th-century sources including Ynglinga saga, Nafnaþulur, and the Völsunga saga. If historical, he would have lived in the 5th century.