A derby name, roller derby name or skater name is a nickname used by a skater while playing or officiating roller derby.

Derby names can be seen as an opportunity to adopt an alternative on-track persona.^[1] Many derby names are puns, and in some cases this may extend to the skater's number.^[2] Other names may be chosen to reflect a skater's playing style or ability.^[3] Tablet Magazine describes the ideal derby name as showing "both aggression and humor" and "reveal[ing] something about the skater".^[4] For example, Hydra, a former Texas Rollergirls skater, chose her name in part due to her profession as a hydrologist, and in part in reference to the mythological creature.^[5] Fagundes suggests that the ideal derby name "sounds something like a real name", in that it has a plausible first- and last-name, "connects to derby", and contributes to an "overall persona". He gives LA Derby Dolls skater Tara Armov as an example of an ideal-type name.^[6]

Although some skaters in pre-2000 banked track roller derby did have nicknames, the tradition of derby names did not emerge until the early-2000s revival in Austin, Texas, which was mirrored by Ivanna S. Pankin of Arizona Roller Derby, who had previously used her derby name while working as a musician.^[6]

Around 40,000 skater names are registered on the International Rollergirls' Master Roster.^[7] The roster originated as a spreadsheet kept by Hydra. In November 2004, Axles of Evil proposed that a centralised record of derby names be created, and Hydra then launched the roster publicly.^[8] Hydra passed responsibility for the roster to Paige Burner, Soylent Mean and Jelly HoNut late the following year, by which point it already had more than two thousand entries.^[6]

Despite its name, the roster also includes the derby names of male skaters, referees and other officials.^[9] Names on the roster are not permitted to be identical or very similar to pre-existing entries.^[5] This is not reflective of actual WFTDA policy, which allows skaters to have the same derby name.^[10] The growing popularity of roller derby has also made creating an entirely unique name much more difficult.^[11] The International Rollergirls' Master Roster has other restrictions, such as prohibitions on names starting with possessives, ending with gerunds, or very general, such as "Skater".^[8]

Many leagues will only submit derby names to the roster once a skater has shown significant commitment to the sport.^[8] For example, it took more than four months of practice before Nicole Williams adopted her derby name, "Bonnie Thunders".^[12]

A few skaters choose to trademark their roller derby names,^[5] and this practice may occasionally lead to conflict. For example, when Mad Rollin' Dolls skater Crackerjack attempted to trademark her name, in order to license it for use in a video game, she was sued by the manufacturers of the Cracker Jack snack food.^[3]

Skaters are not required to use derby names, and a few do skate under their legal names. This may be due to dissatisfaction with the name which they used in the past,^[13] or, like leading London Rollergirls skater Stephanie Mainey, in an effort to legitimise the sport.^[14] Other skaters counter that derby names are an important part of the culture of the sport, and reflect the use of nicknames in many other sports.^[8]