The masked killer in the Scream films, normally called simply Ghostface, actually has another name, both in-universe and outside of it. Unlike most iconic slashers, Ghostface isn't an actual person or any one single entity. Instead, Ghostface is an identity and costume adopted by the various killers found in the Scream franchise, in both the four films directed by Wes Craven and the Scream TV series. Thus, Ghostface is a constant mystery, as anyone under the mask could possess a motivation or skills never exhibited by any prior Ghostface killer.
Boasting an expression somewhat reminiscent of the Edvard Munch painting "The Scream," the Ghostface persona was first adopted onscreen by the duo of Billy Loomis and Stu Macher in the original Scream film, then picked up again by the duo of Mickey Altieri and Debbie Looms in Scream 2. Ghostface was solely portrayed by Roman Bridger in Scream 3, and then another duo in Scream 4, that being Jill Roberts and Charlie Walker. With Scream 5 currently in the works, it remains to be seen who'll don the costume next.
However, while Ghostface is how the killer is normally referred to, that particular mask and costume actually has a name, two in fact. One is what the costume is called by the real life company that made it, and two is what the costume is called by the company that made it within the Scream movie universe.
The Ghostface's Killer Real Secret Name
In real life, the Ghostface costume and mask was manufactured and created by the company Fun World, and Wes Craven received permission from them to use it within Scream. The idea of course being that the Ghostface costume is something anyone can readily go out and purchase, making it harder to pinpoint the person behind it. In reality, the Ghostface mask is called "The Peanut-Eyed Ghost" by Fun World, and was part of a line of products by the company called Fantastic Faces.
Within the Scream universe though, the Ghostface mask and costume has yet another name, as is visible when Dewey brings a version of the costume into the police station after Ghostface attacks Sidney. The packaging of the costume calls it "Father Death," which is actually pretty damn cool, and would've arguably been a better name than Ghostface. Interestingly, Ghostface actually isn't called that onscreen (outside of a mocking taunt by Tatum in the first film) until Scream 4, suggesting the filmmakers may not have actually been too keen on their killer even being named that in the first place.