When you take Only One Name to the extreme, this is the result. Most often a Code Name. For some reason letters from the second half of the alphabet are much more likely to be chosen. Even people who change their names to something starting with A to get to the top of an alphabetical list seem to never use just A. Compare You Are Number Six, when the name is a number. Not to Be Confused With One-Letter Title. Examples of One-Letter Name include: