While the the rock king ruled the island itself, the salt king commanded the isle's ships whenever they were at sea. Each type of king was chosen at kingsmoots. An island's salt king was usually younger than its rock king. The two were sometimes father and son, and in some other cases they came from rival houses.
The tradition of salt kings ended when Urron Greyiron attacked the attendees of the kingsmoot deciding the successor to Urragon IV Greyiron. Urron Redhand made House Greyiron the hereditary Kings of the Iron Islands, and the rock and salt kings were reduced to lords or extinguished.
Known salt kings
- Urras Greyiron, called Ironfoot, salt king of Orkmont
- Urron Greyiron, called Urron Redhand, salt king of Orkmont and the first King of the Iron Islands
—writings of Yandel