Full Government Name
Although she stopped using it as a "secret identity", it's been Wonder Woman's alias since she stole the name from an army nurse in World War 2 so she could stay close the injured Steve Rogers.
Diana Prince
It's the house motto of the Starks
Winter Is Coming
He created the galaxy far, far away and is sometimes called "The Maker" by his fans.
George Lucas
Misquoted as "Luke, I am your father", what he actually said was "No, I am your father".
Darth Vader
It's called "The largest pop culture convention in the world"
San Diego Comic Con
Charles Francis Xavier
These Doctor Who foes yell "Exterminate!"
Daleks
Long before he wrote the comics Invincible and The Walking Dead, his first book was "Battle Pope"
Robert Kirkman
Daily Double
They're the two droids Luke's uncle bought from the jawas in the original movie.
R2-D2
C-3P0
It's the AI antagonist in the video game "Portal"
GLA-DoS
Supergirl's Kryptonian name
Kara Zor-el
Castiel is this kind of creature on the show Supernatural
Angel
He survived two plane crashes in the military (one as the pilot), and one while working for Pan Am. He eventually resigned and went on to create Star Trek.
Gene Roddenberry
Sir Christopher Lee played this fallen jedi and nobleman in the prequel movies.
Count Dooku
Sir Galahad faced almost certain temptation in this castle in "Monty Python and the Holy Grail"
Castle Anthrax
Hogwart's headmaster for most of the Harry Potter books, right up to page 495 of book 6 (hardback edition)
Albus Percival Wulfric Brian Dumbledore
It's the show that features "The Satellite of Love"
Mystery Science Theater 3000
Also known as Lord British, he created the Ultima computer games and pioneered the persistent-world online multiplayer role playing genre with Ultima Online.
Richard Garriott
It's the crystal inside of a jedi's lightsaber, usually blue or green for jedi, and red for dark side users.
Kyber
You might find a Snorlax, Lotad, or Phanphy in this cartoon or game... or a Pikachu.
Pokemon
The hero(?) of the original "splatstick" Evil Dead movies and Army of Darkness, but he usually just goes by "Ash"
Ashley Joanna Williams
Parks and Rec's fictional board game created by show character Ben Wyatt. It's now an actual game you can buy and play at home.
The Cones of Dunshire
The legendary artist and designer who helped create the look of Star Wars, Battlestar Galactica, Buck Rogers, Close Encounters, E.T., and even Star Trek
Ralph McQuarrie
As shown in the movie "Solo: A Star Wars Story" - it's the fuel that hyperdrives need in order to make their jumps to lightspeed.
Coaxium
The shards of Narsil, sword of Isildur, were reforged and given to Aragorn, son of Arathorn as this weapon.
Anduril (Flame of the West)