Counterfactual

The Parallel Lives of Kayley and Chelsey

In 45 girls, Kayley found its level. 50 years earlier, Chelsey occupied that same statistical address.

1977–2025

Kayley

peak 1999 2025 198020002020
Peak year 1999
Peak births 461
Latest count 45
Status Endangered
Peak generation Gen Z
1969–2025

Chelsey

peak 1992 2025 198020002020
Peak year 1992
Peak births 2,880
Latest count 18
Status Endangered
Peak generation Millennial
Kayley and Chelsey peaked in the same cultural weather — the Gen Z naming world. They are not replacements; they are siblings separated by 50 years, occupying the same statistical address at different addresses in time.