Billy
Feminine · “Diminutive of William”
Billy is given to boys far more often — 384,233 boys against 5,432 girls since 1880. See Billy as a boy name
Bill from William is one of the strangest habits in English naming: the first consonant is replaced with a rhyming one. Will became Bill, Rob became Bob, Rick became Dick, Meg became Peg. No other European language does this, and nobody has fully explained why English started.
How old is the name Billy?
Billy first appears in US birth records in 1899 — 126 years ago. The typical Billy alive today was born around 1943, making them about 82 years old. About 2,800 people named Billy are estimated to be alive in the US today.
When was the name Billy most popular?
Billy peaked in 1930, reaching #526 nationally. Today it ranks #7491, 6,965 places below that high. See the whole 1930 chart.
Lists built from the same records:
Where it comes from
From William to Billy
The story of Billy
Rhyming nicknames are a late-medieval English peculiarity, and the standard examples are consistent: Robert to Rob to Bob, Richard to Rick to Dick, Roger to Hodge, Margaret to Meg to Peg, Mary to Molly to Polly, Edward to Ned. One explanation is that the substitution made the pet form distinct from the formal one in speech; another points at the sheer frequency of a handful of names in medieval England, where a village might hold six Williams and need six ways to tell them apart. Neither is proven. As a girls' name Billy peaks in 1930, in the same American window that gave women Bobbie, Frankie and Jackie, and it has been used steadily but thinly ever since.
Meaning
Diminutive of William — Germanic "resolute protector"
William is Germanic wil, will or desire, plus helm, a helmet or protection. Will is the ordinary clip; Bill is the rhyming substitution, attested from the fifteenth century. As a female name Billy usually points to William in the family, or to Wilhelmina, or is chosen as a name in its own right. It carries no separate meaning.
How the name formed
- William
- Will
- Bill
- Billy
Related forms: Billie · Wilhelmina
Pronouncing Billy
BILL-ee
Two syllables, stress on the first. Billy and Billie are pronounced identically; only the spelling carries a sex signal, and even that is not reliable.
Nicknames for Billy
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1899
- Most girls named
- 1927157 — the highest on record
- Peak rank
- #526reached in 1930
- Change vs 2023
- +55.6%14 in 2025, from 9
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Billy in other languages
The same name elsewhere
- Billie in English — spelling variant
- Wilhelmina in English — related form
Billys among us
people named Billy are estimated to be alive in the US today
About 1 girl in 114,805 born in 2025 was named Billy
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
The Myrtice test
Every popular name lives one long story — a climb, a peak, a slow settling back. Billy's later chapters haven't been written yet, so we borrowed them: Myrtice climbed just as high around 1907, and its whole arc is on record. Line the two peaks up, and Myrtice's path sketches the road Billy is walking now.
Billy sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Billy beside its neighbors
The names ranked closest to Billy in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- It is short, phonetic and universally readable.
- It has a documented history as a women's name back to the 1920s.
- The rhyming-nickname habit behind it is genuinely old English.
- It reads as masculine to most Americans in the -y spelling.
- It is heard as a nickname rather than a full legal name.
- The 1930s peak dates a bearer strongly.
Nobody names a baby alone.
Put Billy to the vote.
Add it to a family vote or a couple’s swipe deck — the other person gets one card, a simple answer and room to say why. No app, no account for them.
Only the people you invite can see your list.
Already decided on Billy? Hide it among decoys and let them guess.
What they receive
Someone added a name to your list
Billy
Feminine · #7491 in the U.S.
Frequently asked
- How many Billys are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 2,800 people named Billy are estimated to be alive in the US today.
- How popular is the name Billy in 2025?
- Billy ranks #7491 among US girl names in 2025, with 14 babies given the name.
- How rare is the name Billy?
- About 1 in every 114,805 US girls born in 2025 was named Billy — 14 in all.
- Will my child share the name Billy with classmates?
- Billy will almost certainly be the only one in school.
Ranked beside Billy
Names sitting at a similar level of popularity right now.
Christie#7491 · Carmelita#7491 · Jetta#7491 · Hildegard#7491 · Rickie#7491 · Angelyn#7491 · Mimi#7491 · Jewell#7491
Looking for what else is popular rather than what resembles Billy? See the current top 100.
Choosing between Billy and another name?
See them side by side — full stats, history and a gentle verdict.
Compare side by sideIn a hurry? Just pick a winner — one tap, no sign-up, and you see how everyone else voted.
Weighing a whole shortlist? Add the rest in the builder, or settle it with a bracket.
Cast your vote
Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
US figures from the Social Security Administration. 1880–2025. Data & methodology
No advertising trackers and no data sellinghow we handle your dataindependent and founder-run, about Name Battle