Some characters are so iconic we know them by just one name, or even a nickname. But sometimes, we get a big reveal that changes everything, or at least makes us laugh. From the mystery of Mr. Big to the real identify of Keyser Söze, here are some of the most exciting and surprising character name reveals of the past few decades. Warning: spoilers ahead!

Kramer – Seinfeld

For most of Seinfeld, Jerry’s neighbor Kramer is solely referred to by his surname. In Season 6, however, his mother appears on screen and spills that Kramer’s first name is Cosmo, an odd name that fits his eccentric personality quite well.

Wilson – Home Improvement

Another sitcom character, Home Improvement’s Wilson, is best known as Tim’s neighbor who is only ever seen with most of his face obscured by the fence bisecting their yards. Although he is called simply Wilson throughout much of the series, the biggest reveal is his full face — shown at the final curtain call — rather than his full name, Wilson W. Wilson.

Hodor – Game of Thrones

In one of the more heartbreaking name reveals, the Game of Thrones audience discovered this mostly mute character’s real name is Wylis. Visions experienced by another character reveal the truth: as a young boy, Wylis saw his future self using all of his strength to try to hold a door against an undead invasion. Repeating “hold the door” over and over, he eventually fuses it into “hodor.” It becomes the only word he can say, and thus his moniker.

Saul Goodman – Breaking Bad/Better Call Saul

One of the standout characters from Breaking Bad, Saul Goodman, is eventually discovered to have reinvented himself from James “Slippin’ Jimmy” McGill. Spinoff series Better Call Saul delves into the specifics, explaining that Jimmy sought a way to distance himself from his family reputation and strike out as his own sort of lawyer by taking on the persona of Saul Goodman. The name is an onomastic pun from the phrase, ‘S’all good, man!

Darth Vader – Star Wars – Anakin Skywalker

In arguably the most well-known Star Wars quote, Darth Vader tells Luke Skywalker, “I am your father.” This reveals not just Luke’s paternity but also the fact that Darth Vader began as Anakin Skywalker before falling to the dark side. And not just the viewers were shocked — George Lucas intentionally kept this reveal hidden from most of the cast to increase shock value.

Keyser Söze – The Usual Suspects

Roger “Verbal” Kint spends The Usual Suspects detailing the misdeeds of drug dealer, murderer, and all-around criminal mastermind Keyser Söze. Discussed in whispers among criminals and law enforcement alike, Söze is viewed as almost mythical. Verbal Kint explains how he was roped into Söze’s crimes then leaves the station. The reveal comes when the detective looks around the room and realizes everything Verbal Kint shared was cobbled together based on what he saw on the detective’s bulletin board. Surprise! Verbal Kint is Keyser Söze.

The Janitor – Scrubs

The Janitor, ongoing nemesis of Scrubs protagonist J.D, eventually reveals his name to be Glenn Matthews in the series finale. Or… does he? It isn’t the first time he throws out a name, most of which have been false.

Rosebud – Citizen Kane

A major plot point of Citizen Kane revolves around the identity of “Rosebud.” The last word spoken by Kane, “Rosebud” causes a scramble among journalists and others seeking to understand who or what it refers to. The end of the movie shows the audience—but no one characterized in the film itself—that Rosebud was the word written on a sled Kane loved as a child. It’s believed to symbolize his lost innocence.

Lord Voldemort – Harry Potter

He Who Shall Not Be Named, otherwise known as Lord Voldemort, is the main antagonist throughout the Harry Potter book and film series. Harry eventually discovers in Tom Riddle’s diary that Voldemort is Tom Riddle himself. He turned his name, Tom Marvolo Riddle, into an anagram: I Am Lord Voldemort.

Fonzie – Happy Days

Fonzie, Richie’s leather-jacket-clad greaser pal in Happy Days, is really Arthur Fonzarelli. While the reveal of his full name wasn’t necessarily a surprise or twist, it served as a contrast between his street-smart, Italian-American background with the Cunningham family’s wholesome 1950s Americana.

Gilligan – Gilligan’s Island

Throughout the group’s three-hour tour turned desert-island adventure, Gilligan is referred to solely by his mononym. Some sequel and spin-off material alleges his real name to be Willie Gilligan, but the show’s creator Sherwood Schwartz maintains Gilligan is actually the character’s first name. We may never know.

Monsieur Madeleine – Les Misérables

In the musical Les Miserables, factory owner and mayor Monsieur Madeleine reveals his true identity and past in court: he’s Jean Valjean, convict. After a police inspector who guarded Valjean in prison becomes suspicious, he tells “Monsieur Madeleine” that criminal Jean Valjean has been caught. Not wanting an innocent person to suffer for his own crimes, the real Valjean reveals his true identity.

Fez – That 70s Show

Fez, the exchange student from an undisclosed location outside of the States, never actually gets a chance to reveal his true name. He starts to share it in one episode, only to be cut off before he can finish. The joke is that his name is so foreign it’s unpronounceable, so he’s instead referred to as the acronym F.E.S. an acronym for Foreign Exchange Student.

Mr. Big – Sex and the City

Throughout the entirety of Sex and the City, main character Carrie Bradshaw pines over Mr. Big, a wealthy and powerful NYC businessman. Even as they engage in an on-again-off-again relationship, she never calls him by name, to either her friends or the audience. It’s only in the series finale when he’s discovered to be named John, full name being John James Preston.

Jughead Jones – Riverdale/Archie Comics

Chances are, you probably knew someone didn’t actually bestow their child with the given name “Jughead,” but where did it come from? As revealed in Riverdale, Jughead’s name is Forsythe Pendleton Jones III. His father, Serpents gang leader Forsythe Pendleton Jones II, goes by F.P, while Jughead’s sister Forsythia chooses to be called Jellybean.

AC Slater – Saved by the Bell

Tough guy AC Slater is a jock and a ladies’ man, the “big man on campus” at Bayside High. That’s probably why he keeps it under wraps that his real name is Albert Clifford Slater. A name like that would be more suited for someone like Screech Powers, who is actually named Samuel.

Mr. Spock – Star Trek

Even if you’re not a die-hard Trekkie, you probably know Spock by his pointy, elfin ears. But even the most hardcore fans might not know his real name. Because he’s half Vulcan and half human, he knows most Vulcan names are difficult for humans to pronounce. That’s why he goes by simply Spock or Mr. Spock, instead of S’chn T’gai Spock.

MacGyver – Angus

MacGyver’s real name isn’t revealed until season 7, addressing fans’ longheld question. In the episode “Good Knight MacGyver,” it’s declared that his first name is Angus.

ALF – ALF

ALF is a 1980s sitcom depicting a family who takes in an alien from the planet Melmac after his crash lands into their garage. The family nicknames him ALF, for “Alien Life Form,” only to eventually discover his real name is Gordon Shumway.

And for a fun bonus fact, if not exactly a reveal, the series House was a medicine-focused reimagining of Sherlock Holmes (House… Holmes… you get it!). House’s Wilson serves as the Watson character, while both House and Holmes are geniuses with an unfortunate drug habit — and both live at 221B Baker Street. In season 2 of House, there is even an appearance by famed antagonist Moriarty.