Jacy
Feminine
Jacy is given to both — 3,416 girls and 756 boys since 1880. See Jacy as a boy nameSee other names given to both
Jacy is recorded for boys and girls alike and has at least three plausible sources. One of them is a word for the moon in a language that was spoken along the Brazilian coast when the Portuguese arrived.
How old is the name Jacy?
Jacy first appears in US birth records in 1961 — 64 years ago. The typical Jacy alive today was born around 1998, making them about 27 years old. About 3,400 people named Jacy are estimated to be alive in the US today.
When was the name Jacy most popular?
Jacy peaked in 1992, reaching #1170 nationally. Today it ranks #7491, 6,321 places below that high. See the whole 1992 chart.
Lists built from the same records:
Where it comes from
Origin, sound and short forms
Our story of Jacy
Tupi was the lingua franca of coastal Brazil for two centuries after contact, used by settlers and missionaries as well as by the people whose language it was, and it left a very large mark on Brazilian Portuguese. Thousands of place names come from it, along with the ordinary words for a great many plants and animals, and a set of given names that Brazilians still use without necessarily knowing their source. Jaci is one of those: the moon, often personified in the stories as female. The language itself declined sharply, though descendants of it are still spoken in the Amazon, and its vocabulary is all over the map of a country of two hundred million people.
Meaningnot established
Not established
The Tupi word for the moon is a real and documented source for a Brazilian name of this shape. An American Jacy may equally be built from initials or from Jacinta or Jason, and the record does not choose.
Pronouncing Jacy
JAY-see
Two syllables with the stress in front. In Portuguese the name is closer to zhah-SEE, with the weight at the end.
Nicknames for Jacy
Limited
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
- 1961
- Most girls named
- 1992150 — the highest on record
- Peak rank
- #1170reached in 1992
- Change vs 2024
- −26.3%14 in 2025, from 19
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.
Jacy in other languages
The same name elsewhere
- Jaci in Portuguese — related form
Strongest US states over the last decade: Texas.
Jacys among us
people named Jacy are estimated to be alive in the US today
About 1 girl in 114,805 born in 2025 was named Jacy
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Jacy
- #7491
- Jacy on the 2025 chart
- #888
- counting every spelling
The SSA counts spellings, not names. Jacy went to 14 girls in 2025, but Jaci is the same name said out loud. Together the 2 spellings went to 72, which makes it the 888th most-given girls’ name of the year — 6,603 places above the chart.
- Jaci58
- Jacy14
About 1 girl in 22,323 born in 2025 was given one of these spellings — against 1 in 114,805 for Jacy itself.
Spellings are grouped by a fixed rule that folds interchangeable English spellings of one sound (ck/k, ph/f, x/ks, a non-initial y for i) and keeps vowels apart, so Sean and Shawn stay separate names. It errs towards splitting: a family here is never larger than the truth. SSA national data, 2025. Method
Is it right for you
What happens to a name after it peaks
The Torri test
Every popular name lives one long story — a climb, a peak, a slow settling back. Jacy's later chapters haven't been written yet, so we borrowed them: Torri climbed just as high around 1977, and its whole arc is on record. Line the two peaks up, and Torri's path sketches the road Jacy is walking now.
Jacy 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
Jacy beside its neighbors
The names ranked closest to Jacy in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- Four letters and two syllables: quick to write and easy to learn.
- It is recorded for boys and for girls, so it does not force a reading on anyone.
- It is read correctly at first sight by nearly everybody in English.
- Jacey, Jaycee and Jaci are all in the record, so the spelling will be checked back with you.
- The English and Portuguese readings are quite different, so the name travels less cleanly than it looks.
- No origin is documented for the American name, so the meaning question has three candidates and no answer.
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Jacy
Feminine · #7491 in the U.S.
Frequently asked
- How many Jacys are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 3,400 people named Jacy are estimated to be alive in the US today.
- How do you spell Jacy?
- Jacy is one of 2 recorded spellings. Jaci is the more common one — 58 births in 2025 against 14 for Jacy.
- How popular is the name Jacy in 2025?
- Jacy ranks #7491 among US girl names in 2025, with 14 babies given the name.
- How rare is the name Jacy?
- About 1 in every 114,805 US girls born in 2025 was named Jacy — 14 in all.
- Will my child share the name Jacy with classmates?
- Jacy will almost certainly be the only one in school.
Ranked beside Jacy
Names sitting at a similar level of popularity right now.
Christie#7491 · Carmelita#7491 · Jetta#7491 · Hildegard#7491 · Rickie#7491 · Billy#7491 · Angelyn#7491 · Jewell#7491
Looking for what else is popular rather than what resembles Jacy? See the current top 100.
Choosing between Jacy and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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