Joo
UnisexGirls' nameBoys' nameMeaning not yet documented
Joo has been given to 15 babies in the U.S. since 1968. 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 1968, with 5 recorded. It's used for both sexes: 67% girls, 33% boys all-time.
Babies named Joo, 1986
1 in 711,000
Joo 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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.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 — Joo over time
In 1990, Joo 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 Joo?
Joo had fewer than 5 recorded uses in 2025, so these figures use 1986, the last year it was published.
- Among all babies, 1986
- 1 in 711,000
- 5 of 3,556,724 births
- Among girls only
- 1 in 343,000
- <0.01% of girls
- Rank, 1986
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 493,068 kids
- Even odds of a second one
Where Joo sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 1986 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 493,068 children born in 1986 and it's an even bet that one of them is another Joo. In a class of 30 the chance is Under 1%.
When Joos were born
Half of everyone ever recorded as Joo was born before 1968 — so the typical Joo is around 57 today.
- Biggest decade
- 1960s
- 50.0% of all use
- Born in the last 25 years
- 100.0%
- A modern name
- Recorded since 1950
- 10
- People you could plausibly meet
1960s — 50.0% of all recorded uses (5).
Is Joo 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 1968 (5)
- Years since peak
- 57
- Years
- Year-to-year steadiness
- Not enough data
- Too few years
Joo around the world
Where Joo 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 & Wales1996–1996#3,795in 1996
Popularity data from Office for National Statistics. ONS data under Open Government Licence v3.0.
Joo by the numbers
The raw record for each sex the name is used for.
As a girl's name
Names similar to Joo
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Joo
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.