Some Islamic rulers are known as Emirs, which is a title of nobility or rank given to a ruler or military commander. The title is derived from the Arabic word 'amir' meaning commander or prince. Historically, Emirs have been in charge of governing a region or state, and have had a great deal of influence over the people living in their domain. In modern times, Emirs are still seen as important figures in many Islamic countries, and are often involved in politics and government.