What is "shadwan"

Shadwan is a barren rocky island 30 miles southwest of the Egyptian city of Sharm el-Sheikh on the Sinai Peninsula and 20 miles notheast of el Gouna. It is the largest of a group of islands in the mouth of the Gulf of Suez in the northern Red Sea and measures in length, and between wide. It was formerly also called Shaker Island and features a lighthouse. The island is famous as a touristic site for underwater diving and fishing.