Counterfactual
The Parallel Lives of Collyns and Gillian
In 100 girls, Collyns found its level. 50 years earlier, Gillian occupied that same statistical address.
2010–2025
Collyns
Peak year
2025
Peak births
100
Latest count
100
Status
Rising
Peak generation
Gen Alpha
1922–2025
Gillian
Peak year
1999
Peak births
1,022
Latest count
47
Status
Endangered
Peak generation
Gen Z
In 100 girls, Collyns found its level. 50 years earlier, Gillian occupied that same address. One peaked in the Gen Z era; the other in the Gen Alpha world. They never met. But the data remembers them both.