Counterfactual

The Parallel Lives of Sierra and Emma

In 476 girls, Sierra found its level. 50 years earlier, Emma occupied that same statistical address.

1940–2025

Sierra

peak 1998 2025 18801900192019401960198020002020
Peak year 1998
Peak births 5,841
Latest count 476
Status Endangered
Peak generation Gen Z
1880–2025

Emma

peak 2003 2025 18801900192019401960198020002020
Peak year 2003
Peak births 22,719
Latest count 12,754
Status Declining
Peak generation Gen Z
Sierra and Emma 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.