Counterfactual
The Parallel Lives of Courtney and Brianna
In 78 girls, Courtney found its level. 50 years earlier, Brianna occupied that same statistical address.
1881–2025
Courtney
Peak year
1990
Peak births
15,380
Latest count
78
Status
Endangered
Peak generation
Millennial
1963–2025
Brianna
Peak year
2000
Peak births
12,880
Latest count
1,372
Status
Declining
Peak generation
Gen Z
Courtney and Brianna peaked in the same cultural weather — the Millennial naming world. They are not replacements; they are siblings separated by 50 years, occupying the same statistical address at different addresses in time.