Counterfactual

The Parallel Lives of Sayuri and Sierra

In 76 girls, Sayuri found its level. 50 years earlier, Sierra occupied that same statistical address.

1979–2025

Sayuri

peak 2007 2025 19401960198020002020
Peak year 2007
Peak births 106
Latest count 76
Status Rising
Peak generation Gen Z
1940–2025

Sierra

peak 1998 2025 19401960198020002020
Peak year 1998
Peak births 5,841
Latest count 476
Status Endangered
Peak generation Gen Z
Sayuri and Sierra 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.