Tarth

Also known as the Sapphire Isle, Tarth is the largest island of the Stormlands, and sits like a jewel in the shining Straits of Tarth[1]. Renowned for its beauty, of rich fertile soil, lakes, and waterfalls, it was coveted by both First Men and Andals in equal measure. The men of Tarth hold themselves to be braver and more honourable than the mainlanders in the rest of the Stormlands, which has cultivated an desire to be free of the control of the Storm Kings.
Though ruled by House Evenstar for millennia, during the Andal Invasion, the isle was split in two with the arrival of House Morne with Ser Galladon Morne claiming the eastern side of the island[2], and within a few years the whole of the island would fall to to the Andals. After the Storming of Tarth, the isle would be awarded instead to Beron Blacktyde.