John Wayne was born Marion Morrison

That'll be the entire Hollywood crowd with very few exceptions

Some that come to mind: Bob Dylan: Robert Alan Zimmerman Elton John: Reginald Dwight Sting; Gordon Summner Bono: Paul Hewson Marilyn Monroe: Norma Jean Baker Woody Allen: Allen Koenigsberg There are many, many others.

Alice Cooper - Vincent Damon Furnier Jean-Claude Van Damme - Jean-Claude Camille François Van Varenberg

Kareem Abdul-Jabbar -- Ferdinand Lewis Alcindor, Jr. Edie Adams -- Elizabeth Edith Enke Joey Adams -- Joseph Abramowitz Nick Adams -- Nicholas Adamshock Eddie Albert -- Edward Albert Heimberger Alan Alda -- Alphonso d?Abruzzo Muhammad Ali -- Cassius Marcellus Clay, Jr. Woody Allen -- Allen Stewart Konigsberg Greg Allman -- Gregory Lenoir June Allyson -- Ella Geisman Don Ameche -- Dominic Felix Amici Julie Andrews -- Julia Elizabeth Wells Eve Arden -- Eunice Quedens R.G. Armstrong -- Robert Golden Armstrong Bea Arthur -- Bernice Frankel Fred Astaire -- Frederick Austerlitz Chet Atkins -- Chester B. Atkins Vivian Austin -- Vivian Coe Frankie Avalon -- Francis Thomas Avalonne Candice Azzara -- Matilda Azzara Babyface -- Kenneth Brian Edmonds Henny Backus -- Henriette Kaye Lauren Bacall -- Betty Joan Perske Kaye Ballard -- Catherine Gloria Balotta Anne Bancroft -- Anna Maria Louisa Italiano Binnie Barnes -- Gertrude Barnes Rona Barrett -- Rona Burstein Gene Barry -- Eugene Klass John Barrymore -- John Blythe Billy Barty -- William John Bertanzetta Jamie Lyn Bauer -- Norma Marvhne Bauer Orson Bean -- Dallas Frederick Burrows Marilyn Beck -- Marilyn Mohr Louie Bellson -- Luigi Balassone Pat Benatar -- Patricia Andrzejewski Johnny Bench -- Johnny Lee Tony Bennett -- Antonio Dominic Benedetto Jack Benny -- Benjamin Kubeisky Shelley Berman -- Sheldon Berman Milton Berle -- Milton Berlinger Irving Berlin -- Israel Baline Billie Bird -- Bird B. Stowell Joey Bishop -- Joseph Abraham Gottlieb Amanda Blake -- Beverly Louise Neill Robert Blake -- Michael Gubitosi Sonny Bono -- Salvatore Phillip Bono Shirley Booth -- Thelma Booth Ford Big Bopper -- Jiles Perry Richardson Ernest Borgnine -- Ermes Effron Borgnino Tom Bosley -- Thomas Edward Bosley David Bowie -- David Robert Hayward-Jones Bart Braverman -- Bartley Louis Braverman Peter Breck -- Joseph Peter Breck Morgan Brittany -- Suzanne Cupito Charles Bronson -- Charles Bunchinsky Albert Brooks -- Albert Einstein Mel Brooks -- Melvin Kaminsky Dr. Joyce Brothers -- Joyce Diane Bauer Don Budge -- John Donald Budge George Burns -- Nathan Brinbaum Richard Burton -- Richard Jenkins Red Buttons -- Aaron Chwatt Sid Caesar -- Sidney Caesar Nicholas Cage -- Nicholas Coppola Michael Caine -- Maurice J. Micklewhite Rory Calhoun -- Francis Timony Durgin Dyan Cannon -- Samile Diane Friesen Truman Capote -- Truman Streckfus Persons Kate Capshaw -- Kathy Sue Nail David Carradine -- John Arthur Carradine Diahann Carroll -- Carol Diahann Johnson Lewis Carroll -- Charles Lutwidge Dodgson Jack Carter -- Jack Chakrin Billy Casper -- William Earl Casper Hopalong Cassidy -- William Lawrence Boyd JoAnn Castle -- Jo Ann Zering Lita Grey Chaplin -- Lillita Louise McMurray Ray Charles -- Ray Charles Robinson Chevy Chase -- Cornelius Crane Chase Chubby Checker -- Ernest Evans Cher -- Cherilyn Sarkisian Liden Chiles -- Truman Linden Chiles Eric Clapton -- Eric Clapp Candy Clark -- Candace June Clark Robert Clary -- Robert Widerman Andrew Dice Clay -- Andrew Silverstein Patsy Cline -- Virginia Patterson Hensley Lee J. Cobb -- Lee Jacob Claudette Colbert -- Lily Chauchoin Nat King Cole -- Nathaniel Adams Coles Perry Como -- Pierino Roland Como Jeff Conaway -- Jeffery Charles William Michael Carol Connors -- Annette Kleinbard Chuck Connors -- Kevin Joseph Connors Mike Connors -- Krekor "Kirk" Ohanian Robert Conrad -- Conrad Robert Falk Alice Cooper -- Vincent Damon Furnier Gary Cooper -- Frank James Cooper Jackie Cooper -- John Cooper, Jr. David Copperfield -- David Kotkin Chick Corea -- Armando Anthony Corea Elvis Costello -- Decian Patrick McManus Lou Costello -- Louis Francis Cristillo Buster Crabbe -- Clarence Linden Crabbe Joan Crawford -- Lucille LeSueur Bing Crosby -- Harry Lillis Crosby Christopher Cross -- Christopher Geppert Scatman Crothers -- Benjamin Sherman Crothers Tom Cruise -- Thomas Cruise Mapother IV Tony Curtis -- Bernard Schwartz Lacy J. Dalton -- Jill Lynne Byrem Vic Damone -- Vito Farinola Rodney Dangerfield -- Jacob Cohen Charlie Daniels -- Charles Edward Daniel Ted Danson -- Edward Bridge Danson III Tony Danza -- Anthony Iadanza Bobby Darin -- Walden Robert Cassotto Doris Day -- Doris Kappelhof Laraine Day -- Laraine Johnson Dizzy Dean -- Jan Hanna Dean Jimmy Dean -- Seth Ward Sandra Dee -- Alexandra Zuck Myrna Dell -- Marilyn Dunlap John Denver -- Henry John Deutschendorf Richard Denning -- Louis Albert Denninger Bo Derek -- Mary Cathleen Collins John Derek -- Derek Harris Angie Dickinson -- Angeline Brown Bo Diddley -- Elias Bates Phyllis Diller -- Phyllis Driver Jean Dixon -- Jeane Pinckert Troy Donahue -- Merle Johnson, Jr. Kirk Douglas -- Issur Danielovitch Demsky Mike Douglas -- Michael Delaney Dowd, Jr. Patty Duke -- Anna Marie Duke Bob Dylan -- Robert Zimmerman Sheena Easton -- Sheena Shirley Orr Buddy Ebsen -- Christian Rudolph Ebsen, Jr. Barbara Eden -- Barbara Huffman Blake Edwards -- William Blake McEdwards Vince Edwards -- Vicent Edward Zoino Duke Ellington -- Edward Kennedy Ellington Gloria Estefan -- Gloria Maria Fajardo Dale Evans -- Frances Octavia Smith Chad Everett -- Raymond Lee Cramton Don Everly -- Isaac Donald Everly Douglas Fairbanks, Jr. -- Douglas Elton Ulman, Jr. Morgan Fairchild -- Patsy Ann McClenny Donna Fargo -- Yvonne Vaughan Jamie Farr -- Jameel Farah Sharon Farrell -- Gretchen Helgeson Freddie Fender -- Baldemar G. Huerta Sally Field -- Sally Mahoney W.C. Fields -- William Claude Dukenfield Rhonda Fleming -- Marilyn Louis Gerald R. Ford -- Leslie Lynch King, Jr. Glenn Ford -- Gwyilyn Ford John Ford -- Sean O?Fearna John Forsythe -- John Lincoln Freund Jodie Foster -- Alicia Christian Foster Redd Foxx -- John Elroy Sanford Connie Francis -- Concetta Maria Franconero John Garfield -- Julius Garfinkle Beverly Garland -- Beverly Lucy Fessenden Judy Garland -- Frances Gumm James Garner -- James Scott Baumgarner Crystal Gayle -- Brenda Webb Bobbie Gentry -- Roberta Streeter Boy George -- George Alan O?Dowd Robert Ginty -- Walter Robert Ginty Whoopi Goldberg -- Caryn Johnson Elliott Gould -- Elliott Goldstein Cary Grant -- Archibald Alexander Leach Peter Graves -- Peter Aurness Rocky Graziano -- Rocco Barbella Shecky Greene -- Sheldon Greenfield Dabbs Greer -- R. William Greer Robert Guillaume -- Robert Peter Williams Buddy Hackett -- Leonard Hacker Connie Haines -- Yvonne Marie Jasme Huntz Hall -- Henry Hall Monty Hall -- Monte Halparin Jean Harlow -- Harlean Carpentier Pat Harrington -- Daniel Patrick Harrington Gary Hart -- Gary Warren Hartpence Susan Hayward -- Edithe Marrener Rita Hayworth -- Margarita Cansino Chick Hearn -- Francis Hearn Eileen Heckart -- Anna Eileen Heckart Pee Wee Herman -- Paul Rubenfeld Hulk Hogan -- Terry Jean Bollette William Holden -- William Franklin Beedle, Jr. Billie Holiday -- Eleanora Fagan Xaviera Hollander -- Xaviera Devries Earl Holliman -- Henry Earl Holliman Buddy Holly -- Charles Hardin Holley Bob Hope -- Leslie Townes Hope Robert Horton -- Meade Howard Horton, Jr. Harry Houdini -- Ehrich Weiss Rock Hudson -- Roy Scherer Engelbert Humperdinck -- Arnold Gerry Dorsey Kim Hunter -- Janet Cole Tab Hunter -- Arthur Andrew Gelien Olivia Hussey -- Olivia Osuna Billy Idol -- William Board Marty Ingels -- Martin Ingerman Burl Ives -- Burle Icle Ivanhoe David Janssen -- David Harold Meyer Bruce Jenner -- William Bruce Jenner Elton John -- Reginald Kenneth Dwight Arte Johnson -- Arthur Stanton Eric Johnson Don Johnson -- Don Wayne Al Jolson -- Asa Hesselson Grandpa Jones -- Louis M. Jones Tom Jones -- Thomas Jones Woodward Boris Karloff -- William Henry Pratt Casey Kasem -- Kemal Amin Kasem Danny Kaye -- David Daniel Kominski Michael Keaton -- Michael Douglas Howard Keel -- Harry Clifford Keel Brian Keith -- Robert Kieth, Jr. B.B. King -- Riley B. King Larry King -- Larry Zieger Ben Kingsley -- Krishna Bhanji Kathleen Kinmont -- Kathleen Kinmont Smith Ted Knight -- Tadeus Konopka Kreskin -- George Kresge, Jr. Cheryl Ladd -- Cheryl Stoppelmoor Frankie Laine -- Frankie LoVecchio Veronica Lake -- Constance Ockleman Jack LaLanne -- Francis Henri LaLanne Dorothy Lamour -- Mary Kaumeyer Ann Landers -- Ester Pauline Friedman Michael Landon -- Eugene Michael Orowitz Stan Laurel -- Arthur Stanley Jefferson Steve Lawrence -- Sidney Liebowitz Brenda Lee -- Brenda Mae Tarpley Bruce Lee -- Lee Yuen Kam Michele Lee -- Michele Lee Dusiak Peggy Lee -- Norma Egstrom Spike Lee -- Shelton Lee Janet Leigh -- Jeanette Helen Morrison Jack Lemmon -- John Uhler Lemmon III Sugar Ray Leonard -- Ray Charles Leonard Huey Lewis -- Hugh Cregg Jerry Lewis -- Joseph Levitch Hal Linden -- Harold Lipschitz Art Linkletter -- Arthur Gordon Linkletter Little Richard -- Richard Penniman Carole Lombard -- Jane Peters Jack Lord -- John Joseph Ryan Sophia Loren -- Sophia Scicoloni Gloria Loring -- Gloria Jean Goff Peter Lorre -- Laszio Lowenstein Bela Lugosi -- Bela Blasko Joe Louis -- Joe Louis Barrow Loretta Lynn -- Loretta Webb Gisele MacKenzie -- Gisele Marie-Louise Marguerite LaFleche Shirley MacLaine -- Shirley Beaty Madonna -- Madonna Louise Ciccone Lee Majors -- Harvey Lee Yeary Malcolm X -- Malcolm Little Karl Malden -- Mladen Sekulovich Ray "Boom Boom" Mancini -- Raymond Michael Mancini Barry Manilow -- Barry Alan Pincus Jayne Mansfield -- Jayne Palmer Fredric March -- Frederick Bickel Rocky Marciano -- Rocco Francis Marchegiano E.G. Marshall -- Edda Gunnar Marshall Peter Marshall -- Pierre LaCock Dean Martin -- Dino Crocetti Wink Martindale -- Winston Conrad Martindale Chico Marx -- Leonard Marx Groucho Marx -- Julius Marx Gummo Marx -- Milton Marx Harpo Marx -- Adolph Marx Zeppo Marx -- Herbert Marx Jackie Mason -- Jacob Masler Walter Matthau -- Walter Matthow Bob Mathias -- Robert Bruce Mathias Virginia Mayo -- Virginia Clark Jones Mitzi McCall -- Mitzi Steiner Rue McClanahan -- Eddi-Rue McClanahan Don McLean -- Donald McLean Ed McMahon -- Edward Leo McMahon Audrey Meadows -- Audrey Cotter Jayne Meadows -- Jayne Cotter Meat Loaf -- Marvin Lee Adair Ethel Merman -- Ethel Zimmermann George Michael -- Georgios Panayiotou Marilyn Michaels -- Marilyn Stermberg Ray Milland -- Reginald Truscott-Jones Alley Mills -- Alison Mills Donna Mills -- Donna Jean Miller Guy Mitchell -- Albert George Cernick Eddie Money -- Edward Mahoney Marilyn Monroe -- Norma Jean Mortensen Montie Montana -- Owen Harlen Mickel Archie Moore -- Archibald Lee Wright Demi Moore -- Demi Gynes Rita Moreno -- Rosita Dolores Alverio Harry Morgan -- Harry Bratsburg Shirley Muldowney -- Shirley Roque Peter Nero -- Bernie Nierow Julie Newmar -- Julia Chalane Newmeyer Juice Newton -- Judy Cohen Chuck Norris -- Carlos Ray Norris Annie Oakley -- Phoebe Annie Oakley Mozee Hugh O?Brian -- Hugh Charles Krampe Maureen O?Hara -- Maureen Fitzsimons Ryan O?Neal -- Patrick Ryan O?Neal Jenna von Oy -- Jennifer Jean von Oy Patti Page -- Clara Ann Fowler Jack Palance -- Walter Jack Paiahnulk Julie Parrish -- Ruby Joyce Wilbar Pat Paulsen -- Patrick Layton Paulsen Johnny Paycheck -- Don Lytle Minnie Pearl -- Sarah Ophella Colley Cannon Bernadette Peters -- Bernadette Lazzaro Paul Peterson -- William Paul Peterson Lou Diamond Phillips -- Lou Upchurch Slim Pickens -- Louis Lindley Mary Pickford -- Gladys Smith Stefanie Powers -- Stefdnia Zofija Federkiewicz Prince -- Prince Rogers Nelson Lee Purcell -- Lee Jeune Williams Sarah Purcell -- Sarah Pentecost Tony Randall -- Leonard Rosenberg Martha Raye -- Margaret Theresa Yvonne Reed Nancy Reagan -- Anne Frances Robbins Robert Redford -- Charles Robert Redford, Jr. Donna Reed -- Donna Belle Mullenger Della Reese -- Delloreese Patricia Early Debbie Reynolds -- Mary Frances Reynolds Ann Richards -- Dorothy Ann Willis Cathy Rigby -- Cathleen Roxanne Rigby Joan Rivers -- Joan Sandra Molinsky Johnny Rivers -- John Henry Ramistella Marty Robbins -- Martin David Robinson Edward G. Robinson -- Emanuel Goldenberg Sugar Ray Robinson -- Walker Smith, Jr. Ginger Rogers -- Virginia Katherine McMath Roy Rogers -- Leonard Slye Mickey Rooney -- Joe Yule, Jr. Lillian Russell -- Helen Leonard Winona Ryder -- Winona Horowitz Jill St. John -- Jill Oppenheim Soupy Sales -- Milton Supman Susan Sarandon -- Susan Abigail Tomalin Randolph Scott -- George Randolph Crane Jane Seymour -- Joyce Frankenberg Del Shannon -- Charles Westover Omar Sharif -- Michael Shalhoub Charlie Sheen -- Carlos Irwin Estevez Martin Sheen -- Ramon Estevez John Schuck -- Conrad John Schuck Lizabeth Scott -- Emma Matzo Al Sharpton -- Alfred Sharpton Phil Silvers -- Phil Silversmith Sinbad -- David Atkins Red Skelton -- Richard Skelton Buffalo Bob Smith -- Robert Emil Schmidt Suzanne Somers -- Suzanne Mahoney Ann Sothern -- Harriet Lake Dusty Springfield -- Mary Isobel Catherine O?Brien Robert Stack -- Robert Modini Barbara Stanwyck -- Ruby Stevens Ringo Starr -- Richard Starkey Connie Stevens -- Concetta Rosalie Ingolia Ray Stevens -- Harold Ray Ragsdale Sting -- Gordon Matthew Sumner Cliffie Stone -- Clifford Gilpen Snyder Gale Storm -- Josephine Cottle Donna Summer -- La Donna Andrea Gaines Rip Taylor -- Charles Elmer, Jr. Robert Taylor -- Spangler Arlington Brugh Danny Thomas -- Muzyad Yakhoob Mel Tillis -- Lonnie Melvin Tillis Y.A. Tittle -- Yelberton Abraham Tittle Randy Travis -- Randy Traywick Sophie Tucker -- Sophia Kalish Tina Turner -- Annie Mae Bullock Mark Twain -- Samuel Langhorne Clemens Twiggy -- Leslie Hornby Conway Twitty -- Harold Jenkins Abigail Van Buren -- (Dear Abby) Pauline Ester Friedman Lindsay Wagner -- Lindsay Jean Ball Christopher Walken -- Ronald Walken Mike Wallace -- Myron Leon Wallace John Wayne -- Marion Michael Morrison Sigourney Weaver -- Susan Weaver Raquel Welch -- Raquel Tejada Tuesday Weld -- Susan Kerr Wells H.G. Wells -- Herbert George Wells Kitty Wells -- Muriel Deason Gene Wilder -- Jerome Silberman Andy Williams -- Howard Andrew Williams Flip Wilson -- Clerow Wilson Shelley Winters -- Shirley Schrift Wolfman Jack -- Robert Smith Stevie Wonder -- Steveland Judkins Lana Wood -- Svetlana Gurdin Natalie Wood -- Natasha Gurdin Jane Wyman -- Sahah Jane Fulks Tammy Wynette -- Wynette Pugh Tina York -- Brigitte Huhle Gig Young -- Byron Barr Loretta Young -- Gretchen Young Henny Youngman -- Henry Youngman Frank Zappa -- Francis Vincent Zappa, Jr.

Boris Karloff = William Henry Pratt.

As you can see, most of them.

Bob Hope was born: Leslie Townes Hope. (Which is funny, because he would have been Les Hope or Hope, Les. I can certainly see why he changed it.)