Counterfactual
The Parallel Lives of Sia and Callie
In 215 girls, Sia found its level. 50 years earlier, Callie occupied that same statistical address.
1968–2025
Sia
Peak year
2025
Peak births
215
Latest count
215
Status
Rising
Peak generation
Gen Alpha
1880–2025
Callie
Peak year
2014
Peak births
1,763
Latest count
1,754
Status
Stable
Peak generation
Gen Alpha
Sia and Callie 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.