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Maurice is Dion's middle name. Dion's full name is Dion Francis DiMucci. He is an American singer, songwriter, and guitarist. He is best known for his hit songs "Runaround Sue" and "The Wanderer". Dion was born in the Bronx, New York City, on August 18, 1939. He began his music career in the late 1950s as a member of the doo-wop group Dion and the Belmonts.