You Are Number Six/Tabletop Games

Examples of in  include:


 * Some of the warforged in Eberron are known by number.
 * Magic the Gathering has the Phyrexian outcast Xantcha. She explains in the novel Planeswalker that "Xantcha" in Phyrexian is the number of the box she was assigned to sleep in. One of her first acts of rebellion was to continue thinking of herself as "Xantcha" after being moved to a different position, turning it into a personal name rather than the designator of an interchangeable part.
 * In Paranoia, all citizens have names like John-R-ZAE-3 (Red security clearance, home sector ZAE, third member of his clone family, i.e. the first two already died and had their memories transplanted). If it's a Punny Name, then occasionally the number is part of it (like Woody-G-UTH-3 writing music for vidshows).