The president of the United States is often called "The Most Powerful Person in the World" and it is also true they have some power over how parents name their children.
Sometimes the president's first name changes baby name history. For example, the name Lyndon spiked after Lyndon Johnson became president. However, if we simply looked at the most popular presidential first names we'd see lots of lists with William, James, and Benjamin on them that have nothing to do with the presidents. Instead, the lists above are the top names inspired by the last names of presidents. The only exception is the inclusion of Quincy in honor of the 6th president, John Quincy Adams.
If you count the list above you will see that 39 distinct presidential names. However, there are have been two presidents each with the last names Johnson, Roosevelt, Bush, and Harrison. That means 43 presidents have had babies named after them and one has not. Who is that one president?
Donald J. Trump.
There are no baby Trump's, yet. Many names, like Bush or Obama are rare, but they both appeared in the data by the year of their election. The data would only show the name if there were at least five baby Trump's crawling around, so it is possible that there are up to four from last year at this moment.
Historically Arthur, Tyler, and Jackson have been the most popular presidential names for boys and Arthur, Reagan, Taylor, and Madison are most popular for girls. In 1950 only 0.32% of all babies were given presidential names. Today, in 2017, it is over 1.67% which is more than five times as common as it was 67 years ago. It is a true trend to name your child with a presidential name. And while it's unlikely that hundreds of parents a year are directly naming their child after William McKinley or Rutherford B. Hayes, you still have to thank the presidents for bringing their last names to the forefront of American society.
Below is a YouTube video created by the Baby Name Institute which goes into a bit more detail on the history of presidential baby names. Check it out!