The most surprising data in the SSA archive isn't the unusual names. It's how fast a normal name can disappear. Names that peaked with tens of thousands of births in a single year now show up in the low double digits, sometimes single digits. Most of these weren't strange names. They were the names of the neighbor across the street.
From thousands of babies to almost nobody
Selected endangered names from the SSA dataset. The numbers show the peak year count and the most recent year count.
Debbie 19,537 to 24
Todd 15,354 to 160
Rhonda 10,950 to 19
Craig 10,718 to 207
Peggy 10,070 to 23
Carole 8,409 to 8
None of these names disappeared because they sounded weird. They disappeared because they got too successful at marking one adult generation. Debbie sounds mid-century because it was a mid-century name. Todd, Craig, Peggy, Rhonda, and Carole carry a generational timestamp parents can hear instantly. None of them want to give their kid a name that sounds 60 years old before the kid is.
The cycle that produces this is consistent. A name becomes common enough to feel safe, then so common it becomes saturated, then closely tied to one age group, then closely tied to retirees, then sometimes available again three generations later. Most names complete the cycle. Some don't make it back.
Browse more at Endangered names, Extinct names, or inspect the paths for Debbie, Todd, Rhonda, and Carole.