Counterfactual
The Parallel Lives of Issabella and Gertrude
In 43 girls, Issabella found its level. 50 years earlier, Gertrude occupied that same statistical address.
1994–2025
Issabella
Peak year
2010
Peak births
137
Latest count
43
Status
Declining
Peak generation
Gen Z
1880–2025
Gertrude
Peak year
1917
Peak births
6,300
Latest count
17
Status
Endangered
Peak generation
Greatest Generation
In 43 girls, Issabella found its level. 50 years earlier, Gertrude occupied that same address. One peaked in the Greatest Generation era; the other in the Gen Z world. They never met. But the data remembers them both.