Wikipedia
Gautrekr
Gautrekr was a legendary Geatish king who appears in several sources, such as Gautreks saga, Hrólfs saga Gautrekssonar, Bósa saga ok Herrauðs, Ynglinga saga, Nafnaþulur (part of the Prose Edda) and Af Upplendinga konungum.
He appears in different temporal settings, and he could represent different kings named Gautrekr, as the name simply means "Geatish ruler". In the various settings, he also has different offspring. However, all settings present him as the son of a Gaut or Gauti, and in one of the later settings, his father Gaut gave his name to Götaland (Geatland).
In Nafnaþulur, he is mentioned as one of the sea-kings, after his father Gauti.