You Are Number Six/Web Comics


 * In the comic Linburger on Slipshine, all non-human citizens of the city of Collision are assigned numbers instead of last names.
 * In the Borderverse the original 18 psychics are given the name "Psychic" and then the number they are in sequence. All of them have since adopted more common names (but only first names, no sir names) and only use their original title as a codename, for instance Michael is Psychic 13 and Gabriel is Psychic 7. The last of the originals, Psychic 19, has no new name, and is only called by the name "19". Except for Michael, who continues to call her different names until he finds one she likes.
 * Three from Path to Greater Good, a case of Only Known by Their Nickname since writing the number 3 is his answer to any question.
 * RPG World has Galgarion's evil soldiers, specifically #347.
 * Schlock Mercenary gives us A Is with names like 5er0, Ga6n, 10001100hae50 (and his batch-sister 10001100he5050e, proving it isn't a compression or disambiguation algorithm), 6100tor, A50ger0, A5050en, and 500a6500. Replace those arabic numerals with roman (and 0 becomes 'non') and 5o150a!
 * Jack contains Fiver, a reference to Watership Down, who calls himself 72, and the titular character, who was once number zero.
 * In 4U City from Sluggy Freelance everyone is known by a number instead of a name, with the exception of "His Masterness."
 * The Borg example is parodied in a sci-fi filler storyline: "Hi, I'm 1 of 3. This is my brother, 2 of 3. And my other brother, 2 of 3.
 * In Trying Human the members of the government orginization "Majestic 12" all refer to themselves by their numbers. 6, who is an engineered lifeform, might not even have an alternative name.
 * A cleverly disguised version appears in Housepets: a mouse named Spo came from a very large family. How large? The sibling born immediately after him was named Spp...
 * The titular character of Henchman Number 9 is never given a name, but is referred to as either number 9 or by the full title "Henchman Number 9," except for his girlfriend who never says his name.
 * In Sinfest, Slick complains of being just another number after a conversation revolving about numbers.
 * All the minions in Minions At Work. Except the penguin.