Counterfactual
The Parallel Lives of Mylie and Lilly
In 58 girls, Mylie found its level. 50 years earlier, Lilly occupied that same statistical address.
1924–2025
Mylie
Peak year
2008
Peak births
337
Latest count
58
Status
Rising
Peak generation
Gen Z
1880–2025
Lilly
Peak year
2010
Peak births
2,891
Latest count
1,218
Status
Declining
Peak generation
Gen Z
Mylie and Lilly 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.