Brain
4,606 recorded births · active 1950–2017
Compare Brain →Living-age distribution
The median living Brain is 47. If you meet a Brain, there's about a 70% chance they're between 37 and 57 years old.
Popularity arc
Peak Brain: 1975. Down 100% from peak.
Gender balance
Brain is almost always given to male babies — 99.8% male.
Rarity
Brain ranks #4,441 out of 105,966 names ever recorded by the SSA.
Geographic fingerprint
Brains are 0.8x more common in the West than the national average.
Predictive modeling
Three statistical models, all fit to Brain's own SSA history plus the historical behavior of every other name in the dataset.
Peak popularity prediction
Brain's modeled peak was #1,341 in 1972 — its trend isn't projected to beat that.
Not enough continuous recent history to project a peak rank.
Name life-cycle stage
A rule-based classifier over recent growth, momentum, and peak proximity.
Brain hasn't shown up in SSA records since 2017 — fewer than 5 babies have gotten the name in any year since, which is below what the SSA even reports.
Popularity survival model
Once a name reaches a rank tier, how long does it typically stay there before falling out?
Built from a Kaplan-Meier survival curve: every historical run any name has ever had above this tier, with runs still ongoing today counted as still in progress rather than as an exit.Brain isn't currently in the Top 100 tier. Estimated chance of entering it in the forecast window: 0%.
If Brain enters Top 100, chance it's still there after:
Names that do enter Top 100 have historically stayed a median of ~19 years. Based on 668 historical Top 100 runs across every name in the dataset.