Counterfactual
The Parallel Lives of Sindy and Caitlyn
In 10 girls, Sindy found its level. 50 years earlier, Caitlyn occupied that same statistical address.
1921–2025
Sindy
Peak year
1979
Peak births
88
Latest count
10
Status
Stable
Peak generation
Gen X
1968–2025
Caitlyn
Peak year
1998
Peak births
2,937
Latest count
71
Status
Endangered
Peak generation
Gen Z
Sindy and Caitlyn peaked in the same cultural weather — the Gen X naming world. They are not replacements; they are siblings separated by 50 years, occupying the same statistical address at different addresses in time.