What is "onela"

Onela was according to Beowulf a Swedish king, the son of Ongentheow and the brother of Ohthere. He usurped the Swedish throne, but was killed by his nephew Eadgils, who won by hiring foreign assistance.

In Scandinavian mythology a Norwegian king by the same name exists, Áli (the Old Norse form of Onela, also rendered as Ole, Åle or Ale), who had the cognomen hinn Upplenzki ("from Oppland").