This is a tough one, as you can check the lists and be sure it is not a popular name and then bang that year it is in the top 100 (talking here from experience, who would think Evelyn would make it back to the top 100, add to that the nickname Evie was pretty much top 5 and may 1 locally, really stuffed up there).
This was us with all three of our girls. We thought none of them were popular, none of them were in the top lists. But no as soon we named our girls they were popular. DD1 and her best friend share the same name. DD2 shares a name with a famous couple's daughter. And since DD3 was born, we have met several girls with the same name, and a version has already been suggested in this thread!