Do you have a really long name, one that doesn't fit in any forms? Or is your name so short people mistake it for your initials? Here are the top 20 lists of the most popular first names based on their length. There is a list for each length of name from two letters long all the way to ten letters long or longer. But first here are two histograms (bar graphs) showing which name lengths are the most common, one based on the count of unique names and the other based on the popularity of the names.