Counterfactual

The Parallel Lives of Marykate and Kylie

In 44 girls, Marykate found its level. 50 years earlier, Kylie occupied that same statistical address.

1958–2025

Marykate

peak 2001 2025 1960198020002020
Peak year 2001
Peak births 85
Latest count 44
Status Stable
Peak generation Gen Z
1960–2025

Kylie

peak 2003 2025 1960198020002020
Peak year 2003
Peak births 5,558
Latest count 1,491
Status Declining
Peak generation Gen Z
Marykate and Kylie 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.