Sayid

• Terrorist
• Mohammed ("Outlaws")
• Boy
• Buddy ("Pilot, Part 2")
• Omar
• Captain Falafel ("House of the Rising Sun")
• Abdul Al Jazeera ("Tabula Rasa")

• Gen-u-ine I-raqi ("Confidence Man")
• Damn Arab ("Solitary")
• Genius ("Outlaws")
• Captain A-rab ("Three Minutes")
• Red Beret ("Three Minutes")

Hurley

• Lardo ("Pilot, Part 2")
• Pork Pie ("Walkabout")
• Stay-Puft ("Raised by Another")
• Pillsbury ("The 23rd Psalm")
• Hoss
• Jehtro ("Fire + Water")
• Jabba ("Fire + Water")
• Rerun
• Hammo
• Barbar (mispronunciation of Babar) ("One of Them")
• Mongo
• Muttonchops ("Lockdown")

• Deepdish
• Hulk ("Dave")
• Grape Ape ("Three Minutes")
• International House of Pancakes ("Tricia Tanaka Is Dead")
• Jumbotron ("Tricia Tanaka Is Dead")
• Snuffy ("Tricia Tanaka Is Dead")
• Grimace ("Enter 77")
• Hero ("Through the Looking Glass, Part 1")
• Montezuma ("Eggtown")
• My Roommate ("Eggtown")
• Kong ("Namaste")
• Bigfoot ("The End")

Jack

• Doc
• The Hero ("Pilot, Part 2")
• Jackass ("Walkabout")
• El Jacko ("The Long Con")
• Saint Jack ("The Moth")
• Chico

• Cowboy
• Damn Spinal Surgeon ("Confidence Man")
• Dr. Quinn ("Solitary")
• Dr. Do-Right ("All the Best Cowboys Have Daddy Issues")
• Hoss
• Winner by a Knockout ("Homecoming")

• Sheriff ("Outlaws")
• Amarillo Slim
• Cool Hand ("Lockdown")
• Dr. Giggles ("S.O.S.")
• Sundance ("There's No Place Like Home, Part 2")

Kate

• Freckles
• Hon'
• Sweet Heart ("Pilot, Part 2")
• The Mighty Huntress ("Walkabout")
• The New Sheriff in Town ("White Rabbit")
• Belle of the Ball ("House of the Rising Sun")
• Baby ("Confidence Man")
• Girl ("Whatever the Case May Be")

• Woman ("Whatever the Case May Be")
• Boar Expert ("Outlaws")
• Puddin'
• Sweetcheeks ("Born to Run")
• Sheena ("The Long Con")
• Thelma ("Maternity Leave")
• Shortcake ("The Glass Ballerina")

• Pippi Longstocking ("Three Minutes")
• Shortcake ("The Glass Ballerina")
• Little Lady ("Further Instructions") ("Every Man for Himself")
• Honey ("I Do")
• Kiddo
• Magellan ("Stranger in a Strange Land")

Locke

• Daniel Boone ("The Hunting Party")
• Mr. Clean ("The Hunting Party")
• Hoss ("The Long Con")
• Johnny Locke ("The Long Con")
• John Boy ("The Brig")
• Colonel Kurtz ("Confirmed Dead")

• Wacko ("The Shape of Things to Come")
• Johnny Boy ("The Little Prince")

Jin

• Mr. Miyagi ("White Rabbit")
• Chief
• Bruce
• Torchy ("...In Translation") (deleted scene)
• Sulu
• Boy ("Born to Run")

• Chewie ("Exodus, Part 2") ("...And Found")
• Jin-Bo ("Tricia Tanaka Is Dead")
• Daddy-o
• Papa-san
• Jin Senior ("The Whole Truth")
• Hoss ("The Package")

Sun

• Betty ("...In Translation")
• Tokyo Rose ("The Long Con")
• Sunshine ("The Whole Truth")

Jin and Sun

• Crouching Tiger and Hidden Dragon ("Enter 77")

Charlie

• Aygo
• Sport ("The Moth")
• Reject From VH1 Has-Beens ("All the Best Cowboys Have Daddy Issues")
• Has-Been Pop Star
• Little Limey Runt ("Special")
• Chuckie ("The Greater Good")

• Tattoo
• Babynapper ("Dave")
• Jiminy Cricket ("Tricia Tanaka Is Dead")
• Munchkin
• Oliver Twist ("Tricia Tanaka Is Dead")

Aaron, Charlie, and Hurley

• Three Men and a Baby ("One of Us")

Claire

• Pregnant Girl ("All the Best Cowboys Have Daddy Issues")
• Missy Claire ("Special")
• Mamacita ("Do No Harm")
• Bar- (possibly Barbie) ("Par Avion")

Aaron

• Baby Huey("The Greater Good")
• Little Baby ("Left Behind")

Michael

• Daddy ("Whatever the Case May Be")
• Boss ("Born to Run")
• Captain ("Born to Run")
• Captain Bligh
• Chief ("Born to Run")
• Mickey ("Born to Run") ("Everybody Hates Hugo")

• Pilot ("Born to Run")
• Han
• Mike ("Exodus, Part 2")
• Hoss
• Bluebeard ("Adrift")

Walt

• Kid
• Tattoo
• Six-Year-Old
• Short Round
• Kazoo or Gazoo ("Exodus, Part 2")
• Taller Ghost Walt ("Confirmed Dead")

Shannon

• Sweet Cheeks ("Pilot, Part 2")
• Sticks ("White Rabbit")

Boone

• Boy ("Tabula Rasa")
• Metro ("Walkabout")
• Son ("Confidence Man")

Ana Lucia

• Cupcake
• Sister ("Orientation")
• Rambina
• Hot Lips
• Bitch ("Everybody Hates Hugo")
• Ponce de León ("Abandoned")

• Ana Lulu ("The Long Con")
• Little Red Riding Hood
• Lucy
• Muchacha ("Two for the Road")
• Little Amiga ("?")

Eko

• Shaft ("Orientation")

Desmond

• Scotty ("The Beginning of the End")

Miles

• Bruce Lee from the Freighter ("Eggtown")
• Donger ("Something Nice Back Home")
• Ghengis("There's No Place Like Home, Part 1")
• Bonsai ("LaFleur")
• Enos ("LaFleur")
• Mr. I-Speak-To-Dead-People ("LaFleur")

Frank

• Shaggy
• Yahoo ("There's No Place Like Home, Part 1")
• Kenny Rogers ("There's No Place Like Home, Part 1")
• Chesty ("The Last Recruit")

Daniel

• Danny Boy ("Because You Left")
• Dilbert
• Whiz-Kid ("Because You Left")
• Dr. Wizard ("The Lie")
• Geek ("Jughead")

• Plato ("LaFleur")
• Mad Scientist ("LaFleur")
• Twitchy ("The Variable")
• H.G. Wells ("The Variable")

Charlotte

• Ginger ("Because You Left")
• Red ("316")  ("LaFleur")

Himself

• Big Bad Wolf ("Do No Harm")
• The Ghost of Christmas Future ("Because You Left")

Juliet

• Wise-ass ("The Lie")
• Sweetheart ("Follow the Leader")
• Blondie ("The Incident, Part 2")
• Baby ("LA X, Part 1") ("The End")

Libby

• Moonbeam ("Dave")

Ben

• The Artist Formerly Known As Henry Gale ("?")
• The Big Kahuna
• George ("Every Man for Himself")
• Captain Bunny Killer ("Stranger in a Strange Land")
• Bug-Eyed Bastard ("One of Us")

• Yoda ("Confirmed Dead")
• Gizmo ("The Economist")

Richard

• buddy...with the eyeliner ("LaFleur")
• Hoss ("LaFleur")

Paulo

• Zorro ("Enter 77")

Nikki and Paulo

• Jabronies ("Exposé")
• Nina and Pablo ("Exposé")

Bernard

• Aunt Suzy
• Bernie ("The Whole Truth")
• Norma Rae ("S.O.S.")

Tom

• Bluebeard ("Adrift")
• Zeke ("The Hunting Party")

Danielle

• French Chick ("Tabula Rasa")
• French Woman ("Whatever the Case May Be")

Karl

• Chachi ("A Tale of Two Cities")
• Bobby (Brady) ("Stranger in a Strange Land")

Alex and Karl

• Cheech and Chong ("Not in Portland")

Alex

• Lollipop
• Sally Slingshot ("Stranger in a Strange Land")
• Sheena ("Not in Portland")
• Sister
• Underdog ("Not in Portland")

Ethan

• Ringer ("All the Best Cowboys Have Daddy Issues")
• Jungle Boy ("Homecoming")

Danny

• Boss ("The Glass Ballerina")
• Broken Nose Guy/Broken Nose Man
• Chinatown ("Every Man for Himself")
• Blockhead ("I Do")

Munson

• Costanza("Every Man for Himself")
• Killer
• Murgatroid
• Punching Bag ("Every Man for Himself")

Roger

• DHARMA janitor
• Skeletor ("Tricia Tanaka Is Dead")

Anthony Cooper

• Pops ("The Brig")

Eloise

• Blondie ("Jughead")

Amy

• Sister ("LaFleur")

Horace

• Bastard
• Boss
• Chief
• Our Fearless Leader ("LaFleur")
• H ("He's Our You")

Radzinsky

• Quick Draw ("Namaste")
• Stu ("He's Our You")

Oldham

• Our you ("He's Our You")

Detective Calderwood

• Croc Hunter ("Hearts and Minds")
• Doctor ("Exodus, Part 1")

Mary Jo

• Baby
• Sweetness ("Outlaws")

Cassidy

• Baby
• Cass ("The Long Con")
• Dimples ("The Long Con")

Cindy

• Earhart ("LA X, Part 2")

Seamus

• Doughboy ("The Candidate")

Sub captain

• Hoss ("The Candidate")