Counterfactual

The Parallel Lives of Ellyn and Kaitlyn

In 7 girls, Ellyn found its level. 50 years earlier, Kaitlyn occupied that same statistical address.

1898–2025

Ellyn

peak 1991 2025 1900192019401960198020002020
Peak year 1991
Peak births 102
Latest count 7
Status Declining
Peak generation Millennial
1971–2025

Kaitlyn

peak 2000 2025 1900192019401960198020002020
Peak year 2000
Peak births 8,759
Latest count 340
Status Endangered
Peak generation Gen Z
Ellyn and Kaitlyn peaked in the same cultural weather — the Millennial naming world. They are not replacements; they are siblings separated by 50 years, occupying the same statistical address at different addresses in time.