Just above þræll, there were Karls. They were the free, working men (and now women) of the Viking age. This tier is represented by the metal of currency, silver.
Konungur directly translates into "King," and this Rank represents Viking royalty. It is also an homage to the king of all blockchains and the modern era, in which the CT793 was created.
Æsir are the Norse Gods and the highest-ranking Vikings. This Rank is represented by the Sunstone (sólarsteinn), which is a mythical Icelandic crystal that allowed Viking seafarers to navigate by the sun, even when overcast, due to polarizing attributes.