Jacolby
Masculine · “Koli's farm”
Jacolby is overwhelmingly a boys’ name — 1,557 boys against 15 girls since 1880.
Jacolby joins a modern prefix to a Norse village. Colby is an English surname from a place name built with -by, the Old Norse word for a settlement, which is scattered across the north of England wherever the Vikings settled — Whitby, Grimsby, Derby, Rugby, Colby. Its American peak is 1992.
How old is the name Jacolby?
Jacolby first appears in US birth records in 1981 — 44 years ago. The typical Jacolby alive today was born around 2001, making them about 24 years old. About 1,500 people named Jacolby are estimated to be alive in the US today.
When was the name Jacolby most popular?
Jacolby peaked in 1992, reaching #1255 nationally. Today it ranks #5861, 4,606 places below that high. See the whole 1992 chart.
Lists built from the same records:
Where it comes from
From by to Jacolby
The story of Jacolby
The Norse settlement of northern and eastern England in the ninth and tenth centuries left a permanent mark on the map: the -by names show almost exactly where Scandinavian settlers lived, and there are hundreds of them in Yorkshire, Lincolnshire and Cumbria. Colby occurs in Norfolk, Cumbria and the Isle of Man. The surname followed the place and crossed to America. Colby's use as a given name grew from the 1980s, and the Ja- prefix — the most productive first element in African-American naming from the 1970s onward — combined with it in the way it combined with dozens of others. Jacolby peaks in 1992, in the middle of that run.
Meaningscholars disagree
Koli's farm, in the Colby element
Old Norse by means a farmstead or village, and it is the second element in hundreds of place names across the Danelaw. The first element of Colby is usually read as the personal name Koli, giving Koli's settlement, though a derivation from kol, 'coal' or 'charcoal', is also proposed. The Ja- prefix at the front of this name carries no lexical content. So the name has a documented half and an American half, which is the standard shape for a compound of this period.
How the name formed
- by
- Colby
- Jacolby
Related forms: Colby · Jakolby
Pronouncing Jacolby
juh-KOHL-bee
Three syllables, stress in the middle, with the long o of cold. The spelling is unambiguous and English readers produce it correctly on sight.
Nicknames for Jacolby
High
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
- 1981
- Most boys named
- 199281 — the highest on record
- Peak rank
- #1255reached in 1992
- Change vs 2024
- +66.7%15 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.
Jacolby in other languages
The same name elsewhere
- Colby in English — related form
- Jakolby in English — spelling variant
Strongest US states over the last decade: Tennessee, Louisiana.
Jacolbys among us
people named Jacolby are estimated to be alive in the US today
About 1 boy in 113,872 born in 2025 was named Jacolby
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 Rosalio test
Every popular name lives one long story — a climb, a peak, a slow settling back. Jacolby's later chapters haven't been written yet, so we borrowed them: Rosalio climbed just as high around 1928, and its whole arc is on record. Line the two peaks up, and Rosalio's path sketches the road Jacolby is walking now.
Jacolby 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
Jacolby beside its neighbors
The names ranked closest to Jacolby in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Colby and Cole are both complete, familiar names available inside it.
- The pronunciation is obvious from the spelling with no competing reading.
- The Norse place-name element behind it is genuinely ancient.
- The prefix has no meaning, so the answer to the meaning question is only half an answer.
- It is easily heard as Colby with something in front.
- Its curve is firmly early-1990s, which places a bearer's generation.
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What they receive
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Jacolby
Masculine · #5861 in the U.S.
Frequently asked
- How many Jacolbys are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 1,500 people named Jacolby are estimated to be alive in the US today.
- How popular is the name Jacolby in 2025?
- Jacolby ranks #5861 among US boy names in 2025, with 15 babies given the name.
- How rare is the name Jacolby?
- About 1 in every 113,872 US boys born in 2025 was named Jacolby — 15 in all.
- Will my child share the name Jacolby with classmates?
- Jacolby will almost certainly be the only one in school.
Ranked beside Jacolby
Names sitting at a similar level of popularity right now.
Eber#5861 · Wilton#5861 · Ruby#5861 · Stacy#5861 · Garner#5861 · Caldwell#5861 · Severin#5861 · Newton#5861
Looking for what else is popular rather than what resembles Jacolby? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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