The name Reginald come from the form REYNOLD.
From the Germanic name Reginwald, composed of the elements ragin "advice" and wald "rule". The Normans (who used forms like Reinald or Reinold) brought the name to Britain, where it reinforced rare Old English and Norse cognates already in existence. It was common during the Middle Ages, but became more rare after the 15th century. (Behind the Name)
Elton John's old name was Reginald Kenneth Dwight.
Hercules. Full name: Elton Hercules John. His previous name was Reginald Kenneth Dwight.
John Reginald Christie, who was a serial killer. Rillington Place was renamed shortly after his conviction.
Elton Hercules John is his actual real name, since he legally changed it in 1972 by deed poll. His birth name was Reginald Kenneth Dwight. As the story goes, he borrowed the name "Elton" from a saxaphone player in one of his earlier bands. When trying to determine a new last name, he reportedly asked his bandmates what they thought would go well with it. Given the unusual name, one bandmate suggested adding something simple and what was more simplier than "John".
Actually Elton John has Olivia Newton John's name. Elton John was born Reginald Kenneth Dwight and changed it to Elton John.
Reginald Lyons's birth name is Lyons, Reginald Edgar.
Reginald Sharland's birth name is Reginald Hanson Sharland.
Reginald Berkeley's birth name is Reginald Cheyne Berkeley.
Reginald Beckwith's birth name is William Reginald Beckwith.
Reginald Bosanquet's birth name is Reginald Tindal Bosanquet.
Reginald Carrington's birth name is Carrington, Reginald George.
Reginald Owen's birth name is John Reginald Owen.
Reginald Gardiner's birth name is William Reginald Gardiner.
Reginald Collin's birth name is Reginald Thomas Collin.
Reginald Fenderson's birth name is Fenderson, Reginald Hartley.
Reginald Le Borg's birth name is Reginald Grobel.
Reginald Sheffield's birth name is Matthew Reginald Sheffield Cassan.