- Roddy Radiation – Rodney Byers
- Johnny Răducanu – Răducanu Creţu
- Charlotte Rae – Charlotte Rae Lubotsky
- Raekwon – Corey Woods
- George Raft – George Ranft
- Jack Raine – Thomas Foster Raine
- Ma Rainey – Gertrude Pridgett
- Jody Rainwater (a.k.a. Little Jody Rainwater) – Charles Edward Johnson
- Marvin Rainwater – Marvin Percy
- Rosa Raisa – Raitza Burchstein
- Rakim – William Griffin
- Jessie Ralph – Jessie Ralph Chambers
- Buck Ram – Samuel Ram
- Natacha Rambova – Winifred Shaughnessy (name legally changed to Winifred Hudnut after she was adopted by her stepfather)
- Twiggy Ramirez – Jeordie Francis White
- Dee Dee Ramone – Douglas Glenn Colvin
- Joey Ramone – Jeffrey Ross Hyman
- Johnny Ramone – John William Cummings
- Marky Ramone – Marc Bell
- Tommy Ramone – Tommy Erdelyi
- CJ Ramone – Christopher Joseph Ward
- Richie Ramone – Richard Reinhardt
- Matt Ramsey – Alden Brown
- Sally Rand (aka Billie Beck) – Helen Harriet Beck
- Frankie Randall (singer) – Frank Joseph Lisbona
- Sue Randall – Marion Burnside Randall
- Tony Randall – Leonard Rosenberg
- James Randi – Randall James Hamilton Zwinge
- Boots Randolph – Homer Randolph
- Jane Randolph – Jane Roemer
- John Randolph – Emanuel Hirsch Cohen
- Joyce Randolph – Joyce Sirola
- Rajinikanth – Shivaji Rao Gaekwad
- Ranking Roger – Roger Charlery
- Shabba Ranks – Rawlston Gordon
- Sally Jessy Raphael – Sally Lowenthal
- Virginia Rappe – Virginia Caroline Rapp
- Dizzee Rascal – Dylan Mills
- Rasta – Lester Speight
- Thalmus Rasulala – Jack Crowder
- Raven – Scott Anthony Levy
- Raven-Symoné (a.k.a. Raven) – Raven-Symoné Christina Pearman
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- Elsa Raven – Elsa Rabinowitz
- Aldo Ray – Aldo Da Re
- James Ray – James Raymond
- Gene Rayburn – Eugene Rubessa
- Jazz Raycole – Jazzmine Raycole Dillingham
- Martha Raye – Margaret Teresa Yvonne Reed
- Ray-J – William Raymond Norwood, Jr.
- Raylene – Stacey Briana Bernstein
- Gene Raymond – Raymond Guion
- Madison Rayne – Ashley Nichole Simmons
- Ray Rayner – Raymond M. Rahner
- Rayvon – Bruce Brewster
- Andy Razaf – Andriamanantena Paul Razafinkarefo
- Maxim Reality – Keeti Palmer
- Jay Reatard – Jimmy Lee Lindsey
- Leon Redbone - Dickran Gobalian
- Redfoo – Stefan Gordy
- Redman – Reginald Noble
- Donna Reed – Donna Belle Mullenger
- Jerry Reed – Jerry Reed Hubbard
- Robert Reed – John Robert Rietz, Jr.
- Tracy Reed – Clare Tracy Compton Pelissier
- Della Reese – Delloreese Patricia Early
- George Reeves – George Keefer Brewer
- Vic Reeves – James Roderick Moir
- William Regal (a.k.a. Steven Regal) – Darren Kenneth Matthews
- Ada Rehan – Ada Crehan
- Max Reinhardt – Maximilian Goldmann
- Judge Reinhold – Edward Ernest Reinhold Jr.
- MC Ren – Lorenzo Patterson
- Duncan Renaldo – Renault Renaldo Duncan
- Diane Renay – Renee Diane Kushner
- Wendy Rene – Mary Frierson
- Ginette Reno – Ginette Reynault (or Ginette Raynault, varying sources)
- Jean Reno – Juan Moreno y Herrera-Jiménez
- Martin Rev – Martin Reverby
- The Reverend Tholomew Plague (a.k.a. The Rev) – James Owen Sullivan
- Dorothy Revier – Doris Velagra
- Alvino Rey – Alvin McBurney
- Antonia Rey – Antonia Francesch Rangel
- Fernando Rey – Fernando Casado D'Arambillet
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- Craig Reynolds – Harold Hugh Enfield
- Debbie Reynolds – Mary Frances Reynolds
- Jody Reynolds – Ralph Joseph Reynolds
- Marjorie Reynolds – Marjorie Goodspeed
- Rhino – Terrance Gerin
- Cody Rhodes – Cody Runnels
- Dustin Rhodes – Dustin Patrick Runnels
- Dusty Rhodes – Virgil Riley Runnels, Jr.
- Erik Rhodes – Ernest Sharpe
- Marjorie Rhodes – Millicent Wise
- Nick Rhodes – Nicholas James Bates
- Randi Rhodes – Randi Beuten
- Busta Rhymes – Trevor Tahiem Smith Jr.
- Matthew Rhys – Matthew Rhys Evans
- Jonathan Rhys Meyers – Jonathan Michael Francis O'Keeffe
- Don Rich – Donald Eugene Ulrich
- Irene Rich – Irene Luther
- Tony Rich – Anthony Jeffries
- Sir Cliff Richard – Harry Rodger Webb
- Little Richard – Richard Wayne Penniman
- Peter Mark Richman – Marvin Jack Richman
- Wendy Richard – Wendy Emerton
- Shane Richie – Shane Patrick Roche
- Lucille Ricksen – Ingeborg Myrtle Elisabeth Ericksen
- John Ridgely – John Huntington Rea
- Suzanne Ridgeway – Ione Ahrens
- Zoogz Rift – Robert Pawlikowski
- Rihanna – Robyn Rihanna Fenty
- Rikishi – Solofa F. Fatu, Jr.
- Rikki – Nakano Ritsuki
- Jeannie C. Riley – Jeanne Carolyn Stephenson
- Belinda Rio – Belinda Ramos
- Elisabeth Risdon – Elizabeth Evans
- Tex Ritter – Woodward Maurice Ritter
- Chita Rivera – Dolores Conchita Figueroa del Rivero
- Mon Rivera – Monserrate Rivera Alers (father) and Efraín Rivera Castillo (son)
- Joan Rivers – Joan Alexandra Molinsky
- Johnny Rivers – John Ramistella
- Melissa Rivers – Melissa Warburg Rosenberg
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