This is the detail page and contains Billy meaning - Billy boy name - Billy popularity.
The Billy name popularity is based upon statistics over the top 1000 popularity list.
Basically here you'll find this informations:
the overall best position (and the year).
how often Billy name was in top 10 or how many times it was in a particular rank position
and how many times that name was in the Top 1000 Popularity list.
If Billy name is used for either gender, you will find statistics for both boy baby name and girl baby name usage.
Remember you can add or remove Billy name to your personal favourite names list (browser must accept cookies).