Wikipedia
Haki
Hake, Haki or Haco, the brother of Hagbard, was a famous Scandinavian sea-king, in Norse mythology. He is mentioned in the 12th century Gesta Danorum, and in 13th-century sources including Ynglinga saga, Nafnaþulur, Völsunga saga. If historical, he would have lived in the 5th century.