Counterfactual

The Parallel Lives of Marycatherine and Caitlyn

In 10 girls, Marycatherine found its level. 50 years earlier, Caitlyn occupied that same statistical address.

1914–2025

Marycatherine

peak 1997 2025 192019401960198020002020
Peak year 1997
Peak births 32
Latest count 10
Status Declining
Peak generation Gen Z
1968–2025

Caitlyn

peak 1998 2025 192019401960198020002020
Peak year 1998
Peak births 2,937
Latest count 71
Status Endangered
Peak generation Gen Z
Marycatherine and Caitlyn 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.