What is Elton John's real name?

The answer is: Reginald Kenneth Dwight. On March 25, 1947, Sir Elton John came into the world — but back then he was given the name Reginald Kenneth Dwight.As one might imagine, that wasn’t exactly the most showbizzy name in the world, so when ol’ Reggie started gaining steam in his music career, he gave it an update. He came up with the name in honor of two early bandmates, saxophonist Elton Dean and vocalist Long John Baldry. And I guess he wanted to stick with the first names for all names structure...He started using the name Elton John in 1967 and in 1972 legally changed his name to Elton Hercules John.Source