According to the Internet source given below, Yusuf Islam (born Steven Demetre Georgiou), commonly known by his stage name Cat Stevens, and later Yusuf, is a British singer-songwriter and multi-instrumentalist. His musical style consists of folk, pop, rock, and, in his later career, Islamic music.
Steven Georgiou was born in Marylebone, London of Greek and Swedish parentage. His career started by performing London coffee houses and pubs under the stage name of Cat Stevens. At the height of his popularity he produced many hits such as Peace Train, Morning has broken and Moonshadow.

Websites:
	Cat Stevens	Biography by wikipedia.org.