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Ring names developed as a way to allow wrestling performers to hide their true identities from the wrestling fanbase and thus keep kayfabe intact, or because the wrestler or the management consider the athlete's real name unattractive, dull, difficult to pronounce or spell, amusing for the wrong reasons, or projecting the wrong image. Since the advent of the Internet, it is now relatively easy to discover the real name of a wrestler, but it was far more difficult in the past.
Some examples of ring names are Michael Shawn Hickenbottom becoming Shawn Michaels, Roderick George Toombs becoming "Rowdy" Roddy Piper, Michael Sean Coulthard becoming Michael Cole, Dwayne Johnson becoming The Rock and Chris Irvine becoming Chris Jericho.
In recent years,[when?] a growing number of wrestlers have adopted their real name or a variation thereof for their in-ring persona, sometimes modifying the spelling of their real name to better fit their gimmick, such as David Bautista becoming Batista, Patricia Stratigeas becoming Trish Stratus and Richard Fliehr becoming Ric Flair. Others simply use part of their name, such as Bill Goldberg using Goldberg, Kenny Dykstra using Kenny, Nicole Garcia-Colace using Nikki Bella, and Mike Mizanin using The Miz, an abbreviation of his surname. Many female wrestlers go solely by their first name as well. Many also use a nickname in addition to their real name for marketability and other reasons
Some (mostly independent) wrestlers, such as Nigel McGuinness, still go to great lengths to ensure that their real names are not publicly known. Professional wrestlers are often referred to by their contemporaries by their ring name. In interviews, Bret Hart has regularly referred to Mark Calaway, Curt Hennig, and Kevin Nash by their ring names (The Undertaker, Mr. Perfect, and Diesel).
Ring names are often trademarked by the promotion that creates a character or gimmick for a performer. It is common to see one performer use a variety of ring names throughout his career, even if his overall persona or gimmick remains similar. That is especially true in WWE, which has largely forced most wrestlers that have debuted since 2006 to use a WWE-owned ring name instead of a ring name that they used on the independent circuit or, such as with Bryan Danielson and a few others, their real name. One notable recent exception was made for David Otunga because of his real-life relationship with singer Jennifer Hudson, which gave WWE some mainstream exposure. For example, Senshi used a ring name specifically for his second TNA stint so that he would continue to hold on to his original ring name, Low Ki, used elsewhere. Another example is Team 3D, formerly known as The Dudley Boyz in ECW and WWE, but WWE trademarked the name leading them to have to change their name when they went to TNA. The members' names (Bubba Ray Dudley, D-Von Dudley, and Spike Dudley) were also trademarked by WWE, forcing them to have to change their names to Brother Ray, Brother Devon, and Brother Runt. WWE partially repealed the policy in 2015, allowing wrestlers who were well-known in other promotions such as Samoa Joe, A.J. Styles, Shinsuke Nakamura, Austin Aries, Karl Anderson, Bobby Roode, and Eric Young to use their long-standing ring names (or in Nakamura and Roode's case, their real name) as well as wrestlers who sign "Tier 2" NXT contracts such as Johnny Gargano and Tommaso Ciampa who wrestle both on NXT and the independent circuit to keep their ring names or (in Gargano's case) their real name. (Gargano and Ciampa have since signed exclusive WWE contracts.) "In-house" WWE wrestlers still use WWE-owned ring names.
In rare cases, the rights to a wrestler's ring name may be owned by a company with little or no connection to professional wrestling, such as Marvel Comics' ownership of the name Hulk Hogan until early 2003, which was due to Hogan being advertised as The Incredible Hulk Hogan early in his career, while Marvel owned the trademark for their comic book character The Incredible Hulk. Sometimes a wrestler will buy the rights to their own ring name; for example, Steve Borden owns the rights to the ring name Sting. Andrew Martin, formerly known as Test, took this one step further and legally changed his name to Andrew "Test" Martin. Jim Hellwig, known as The Ultimate Warrior, had his name legally changed to simply "Warrior".
In many cases, ring names evolve over time as the wrestler's gimmick changes, either subtly or dramatically. After debuting in WWE as the "Connecticut Blueblood", Hunter Hearst Helmsley, Paul Levesque's character morphed into Triple H upon forming D-Generation X. A more drastic change sometimes occurs when a wrestler turns babyface or heel, such as when WCW face Hulk Hogan joined the nWo as Hollywood Hogan. Hogan's villainous new attitude was enhanced by changing his costume color scheme from Hulkamania's red and yellow to nWo's black and white. Brother Ray adopted the name Bully Ray when he turned heel. When Steve Williams joined the wrestling world in the late 1980s, there was already "Dr. Death" Steve Williams. He therefore adopted the name by which he would eventually become famous, Stone Cold Steve Austin or Stunning Steve Austin, which later became his legal name.
Many boxers have used ring names as their mode of identification during their professional boxing careers, particularly more so during the late 19th century and the early 20th century. Some began with the prefix "Kid". Famous examples include:
Various sports martial artists, such as Bill 'Superfoot' Wallace and Benny 'The Jet' Urquidez, have added monikers to their names. Bruce Lee's Chinese name 'little dragon' is, however, more of a screen name due to his acting career.