Kate Perry’s real name is Katy Hudson and the singer changed her name to avoid any confusion with that other Hudson she shares a name with. Demi Moore’s real name is Demetria Guynes. Meg Ryan’s real name is Margaret Mary Emily Anne Hyra but then she chose to be known as Meg Ryan. Woody Allen’s real name is Allen Konigsberg but Allen doesn’t sound very Jewish right. George Michael whose real name is Georgios Kyriacos Panayiotou – and then there are many more who changed their names later.