Counterfactual

The Parallel Lives of Jair and Jonas

In 170 boys, Jair found its level. 50 years earlier, Jonas occupied that same statistical address.

1971–2025

Jair

peak 2003 2025 18801900192019401960198020002020
Peak year 2003
Peak births 480
Latest count 170
Status Stable
Peak generation Gen Z
1880–2025

Jonas

peak 2008 2025 18801900192019401960198020002020
Peak year 2008
Peak births 1,256
Latest count 476
Status Declining
Peak generation Gen Z
Jair and Jonas 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.