Leslie: The Crossover That Completed

Nov 6, 2026 Abigail Adams, Editorial writer

Every crossover story in our files has an ending. Leslie's is the only one we can show you in full, because Leslie's has actually happened.

Start in 1950, when Leslie was about as balanced as a name can be: 2,320 girls and 2,125 boys — a 52/48 split, with the two sides ranked almost identically too (girls #134, boys #126). A Leslie born in 1950 could be anyone. The name belonged to both sexes equally, and had for decades.

Now look at 2025. The girls' Leslie stands at 321 babies. And the boys' Leslie — is not there. Not ranked low. Absent: fewer than five boys in the entire country received the name, below the line where the data stops recording names at all. The boys' Leslie was last listed in 2023, and has now missed two consecutive charts.

The long middle: how a 50/50 name became a 100/0 name

The strange thing about Leslie's crossover is how long it took. The girls took the lead early and decisively — their side peaked in 1957 at 6,104 babies, and by 1960 the split was already 5,240 girls to 1,665 boys. By 1980 it was 4,774 girls to 470 boys — 91% female, girls ranked #61 against the boys' #354.

And still the boys' name persisted. It took another forty years to finish dying: 251 boys in 1990, 94 in 2000, 16 in 2010, exactly 5 in 2020 — survival by a single handful of families — a last listing in 2023, and then the line.

Meanwhile the girls' Leslie has been fading too, on its own slower curve: #90 as recently as 2000 (3,592 babies), down to #745 in 2025 (321 babies). Leslie today is a shrinking girls' name and an extinct boys' name. The crossover completed just in time for the name itself to leave the stage.

Why this one went all the way

Compare the other crossovers in our files. Avery flipped in 1999 and is now 82% girls — but 1,136 boys a year still get the name, a stable minority. Charlie has traded the lead between the sexes within the last decade. Leslie is what happens when there is no floor: no surname revival to refresh the boys' side, no nickname ecosystem (Les never charted as a rescue), and a girls' side that itself kept shrinking, so the name offered boy parents nothing but a dated, feminized association.

The mechanism is the ratchet we see everywhere in this data, run to its conclusion: each year the name reads more feminine, fewer boys receive it, which makes it read more feminine still. Leslie is simply the case where the loop was allowed to finish.

Our advice: Leslie is the reference case for anyone weighing a name that is "starting to cross." Crossovers in this dataset do not reverse, and they do not stop at a friendly 80/20 — given enough decades, they can go to zero. If you love a boys' name that has begun tipping, the question isn't whether it will still be usable in ten years (it will), but whether you're comfortable with where the curve demonstrably ends. Leslie's parents in 1950 chose a balanced name. Their great-grandsons can't choose it at all — not because anyone banned it, but because a million small decisions, compounded over 75 years, closed the door.

The whole story, year by year: Leslie (girl) and Leslie (boy) — the second page is now a historical document.