Wikipedia
The Kingdom of Ormus (also known as Ohrmuzd, Hormuz, and Ohrmazd; Portuguese Ormuz) was a 10th to 17th century kingdom located within the Persian Gulf and extending as far as the Strait of Hormuz. The Kingdom was established by Arab princes in the 10th century who in 1262 came under the suzerainty of Persia, before becoming a client state of the Portuguese Empire.
The kingdom received its name from the fortified port city which served as its capital. It was one of the most important ports in the Middle East at the time as it controlled seaway trading routes through the Persian Gulf to India and East Africa. This port was probably located on Hormuz Island, which is located near the modern city of Bandar-e Abbas.
The name of the port, the island, and the kingdom is Iranian and ultimately derives from that of the Zoroastrian deity, Ahura Mazda, which becomes Ohrmazd in Pahlavi, Hirmiz in Manichaean Middle Persian, and Hormoz in New- Persian.
The Strait of Hormuz is a narrow, strategically important waterway between the Gulf of Oman in the southeast and the Persian Gulf in the southwest. On the north coast is Iran and on the south coast is the United Arab Emirates and Musandam, an exclave of Oman.