Billyjo
UnisexGirls' nameBoys' nameMeaning not yet documented
Billyjo has been given to 78 babies in the U.S. since 1971. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1977, with 11 recorded. It's used for both sexes: 56% girls, 44% boys all-time.
Babies named Billyjo, 1980
1 in 492,000
Billyjo over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
Girls or boys — Billyjo over time
In 1981, Billyjo went to 0% girls and 100% boys.
A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.
How common is Billyjo?
Billyjo had fewer than 5 recorded uses in 2025, so these figures use 1980, the last year it was published.
- Among all babies, 1980
- 1 in 492,000
- 7 of 3,444,198 births
- Among girls only
- 1 in 237,000
- <0.01% of girls
- Rank, 1980
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 341,049 kids
- Even odds of a second one
Where Billyjo sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 1980 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 341,049 children born in 1980 and it's an even bet that one of them is another Billyjo. In a class of 30 the chance is Under 1%.
When Billyjos were born
Half of everyone ever recorded as Billyjo was born before 1977 — so the typical Billyjo is around 48 today.
- Biggest decade
- 1970s
- 84.1% of all use
- Born in the last 25 years
- 100.0%
- A modern name
- Recorded since 1950
- 44
- People you could plausibly meet
1970s — 84.1% of all recorded uses (37).
Is Billyjo rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 1977 (11)
- Years since peak
- 48
- Years
- Year-to-year steadiness
- Volatile
- 49.6% average annual change
Spellings of Billyjo
Billyjo is not the most common spelling — Billy is, with 52.7% against Billyjo's 0.43%.
Billyjo around the world
Where Billyjo ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.
- England & Wales1997–2000#3,912in 2000
- South Australia1969–1993#712in 1993
Popularity data from Office for National Statistics and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. CBS SA data under CC BY 4.0.
Billyjo by the numbers
The raw record for each sex the name is used for.
As a girl's name
Names similar to Billyjo
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Billyjo
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.