Their faces are famous, and you may think you know their identities, but just how well do you these fictional characters? Test your knowledge of the full names of these famous figures.

1. Barbie

Mattel has sold more than a billion Barbie dolls, but despite the toy’s popularity, most people are unaware of the fact that “Barbie” is just a nickname. Her real name is Barbara Millicent Roberts.

2. Peppermint Patty

Charles M. Schulz’s cartoon creation of Peppermint Patty in the popular Peanuts comic strip series may look Irish, but she apparently has German roots. Her real name is Patricia Reichardt.

3. Mr. Snuffleupagus

The woolly mammoth who appears on Sesame Street as Big Bird’s best friend is known as Mr. Snuffleupagus. His full name is Aloysius Snuffleupagus.

4. Cap’n Crunch

The energetic and enthusiastic mascot of Quaker Oats Company’s breakfast cereal, Cap’n Crunch, is more properly known as Captain Horatio Magellan Crunch. Incidentally, the two stripes on his sleeves identify him as having the rank of Commander, not Captain.

5. MacGyver

The man who can make a time machine out of a piece of dryer lint and a roll of duct tape is referred to by his last name, MacGyver, but he has a first name, too: Angus.

6. Mr. Clean

Mr. Clean’s bald head is as famous as the Proctor and Gamble cleaner that his face adorns. You might not be as familiar with his first name: Veritably.

 7. Scooby Doo

The famous crime-solving detective dog commonly known as Scooby Doo is really named Scoobert.

 8. Shaggy

Scooby’s food-loving, long-haired best friend may go by the nickname Shaggy, but his real name is Norville Rogers.

 9. Pillsbury Dough Boy

The ever-squeezable mascot of the Pillsbury Company is officially known as Poppin’ Fresh.

10. Operation Guy

If it weren’t bad enough being perpetually on the operating table, the guy in the Operation game by Milton Bradley also has to labor under the burden of being named Cavity Sam.

 11. The Lone Ranger

A fiery horse with the speed of light, a cloud of dust, and a hearty, “Hi-ho, Silver!” Who was that masked man? Before he became the Lone Ranger, he went by the name John Reid.

12. Alf

The cat-eating alien from Melmac in the television program ALF, adopted the name Alf from the acronym Alien Life Form. His real name is a bit less extraterrestrial: Gordon Shumway.

 13. The Skipper

The long-suffering captain of the S.S. Minnow on Gilligan’s Island is commonly known as the Skipper. The name under which he enlisted, however, is Jonas Grumby.

 14. Casper the Friendly Ghost

Now that he’s dead, he’s known as Casper the Friendly Ghost. While he was flesh and blood, however, he had a different name: Casper McFadden.

15. Winnie the Pooh

The tubby little cubby all stuffed with fluff, may be a willy, nilly, silly old bear, but he happens to have a respectable-sounding name: Edward Bear.

16. Cookie Monster

With a moniker like “Cookie Monster,” one would expect the cookie-loving creature from Sesame Street to have a fierce name such as “Cookiegeddon, Devourer of Confections.” Instead, the furry, blue fellow is actually named “Sid.”

 17. Woodie

I wonder if the star of Toy Story is proud of the fact that his name is Woodie Pride.

 18. Rich Uncle Pennybags

The main character of Hasbro and Parker Brothers’ board game Monopoly is commonly known as Rich Uncle Pennybags. When he signs the foreclosure documents to kick you out of your properties, however, he uses his legal name: Milburn Pennybags.