Initials data, part II

     Back to my initials project. This time, let’s look at last names. I don’t have as much to say here as I did about first names. Here’s the chart:

     Fascinating. The colors just group together different ranges of frequency. I can’t really make much of this, except that all the “Mc”/”Mac” names probably contribute to the M count. And I guess “Smith” alone bumps up the S count. Beyond these ideas, I can’t find much reason. Any ideas?