Sea-King
A sea-king (sækonungr) in the Norse sagas is a title given to a powerful Viking chieftain.
They could be independent or noble Norwegian and Danish chieftains, and also kings of Sweden (such as Yngvi and Jorund), or sons of kings, such as Refil. However, they could also be men "without roof" like Hjörvard the Ylfing; such men without roof could be so powerful that they could subdue a country and make themselves kings. Two examples are Sölve who killed the Swedish king Östen, and Haki who killed the Swedish king Hugleik. However, in both cases they ultimately lost due to lack of popular support.