The Gray Tide principality is ruled by Prince Kel, and it has been since its founding. Most outsiders believe that this is the work of one or more changelings -- a lineage that preserves Kel's image. Some say that Lastpoint is the seat of the secret society known as the Cabinet of Faces; if so, this is one more secret hidden on this island. Kel's holdings are named after the dread magical mist that lingers over the waters surrounding Lastpoint Island.
Source: Dragonshard Part 2
The ruler of the Gray Tide has always and will always be known as Prince Kel (they/them). Most assume it to be a hereditary title passed from changeling to changeling, although rumors abound that the original Prince Kel instead struck a pact with an otherworldly creature for eternal life.
Source: Politics of the Lhazaar Principalities