Counterfactual
The Parallel Lives of Kilian and Jefferson
In 177 boys, Kilian found its level. 50 years earlier, Jefferson occupied that same statistical address.
1970–2025
Kilian
Peak year
2023
Peak births
212
Latest count
177
Status
Rising
Peak generation
Gen Alpha
1880–2025
Jefferson
Peak year
2009
Peak births
444
Latest count
298
Status
Stable
Peak generation
Gen Z
Kilian and Jefferson peaked in the same cultural weather — the Gen Alpha naming world. They are not replacements; they are siblings separated by 50 years, occupying the same statistical address at different addresses in time.