Isle of the Blest.
Yes...that's what the JG publication has listed as well.
IF the island were of the
blessed...as in bless+ed, it would be the island of people who continually experience blessing.
Since it is and island of the
blest, that apparently means that the people there were once blessed....
but not any more.
I would have to say that
City State of the Sea Kings has a lot more power than a city state of people who are or were blessed.