Hormoz, is an Iranian island in the Persian Gulf. Located in the Strait of Hormuz, 5 miles off the Iranian coast, the island is part of Hormozgān Province
he island, known as Organa to the ancient Greeks and as Jarun in the Islamic period, acquired the name of "Hormuz" from the important harbour town of Hormuz (Ormus) on the mainland 60 km away, which had been a center of a minor principality on both sides of the strait. The principality paid tributes to the Mongol-ruled Ilkhanate and was an important source of income from maritime trade. The town's ruler decided to shift his residence to the island during one of dynastic wars around 1300, in order to evade attacks by Mongolian and Turkish groups from the interior. The ruler later made peace with the Ilkhans.