Every generation marvels at the pace of change around it. It's not just that the world is different, it's that it's changing faster. Our parents said it, and now so do we. Is it just a trick of perspective as we get older? Or is our culture actually accelerating?
When it comes to names, I'd say it's a reality: the pace of change is changing. I've taken a rough measure of change by tracking the "novelty rate": the pace of previously uncommon names becoming popular. For each decade, I logged the number of names in the top 1000 for boys and girls which had not made the list in the prior two decades. This novelty rate more than doubled from the 1920s to the 1990s (with a spike in the 1970s, which I'll discuss in a moment):

As you might expect, the styles of novelty changed along with the rate. Here's a closeup of the biggest new names of each decade -- the ones that jumped from obscurity to the top 250. (The higher the name on the chart, the more popular it was.)

Through the '40s, the most common kind of novelty was the use of pet forms like Bobby, Ronnie and Cathy as given names. Starting in the '50s, we start to see more variant spellings (Katelyn, Kaitlin, Kaitlyn) and surname and gender crossovers (Kelly, Lindsay, Taylor). And in the '70s, we see the emergence of distinctly African-American names. This, in fact, is the core of the overall novelty spike in the '70s. In the wake of the Black Power movement, black and white names diverged significantly for the first time and over 100 of the novel names of the '70s were chosen largely by African-American parents.
The names of our decade are still being chosen, but a peek at the 2003 list suggests there's plenty more change ahead. Creative spellings in particular are exploding -- try 10 new variants of Jaden for boys and girls. And ethnic diversity is increasing, with names like Pranav and Hamza making the list for several years running. So don't worry, it's not just you slowing down. The culture really is speeding up.


