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Jacobus

#12,773 in 2025Boys' name

Form of Jacob

Jacobus has been given to 142 babies in the U.S. since 1979. In 2025 it ranked #12,773 of 13,926 boys’ names in use. Its peak year was 1997, with 8 recorded.

Babies named Jacobus, 2025

1 in 663,000

Jacobus over time, 1880–2025

Boys
0246818801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Jacobus: meaning, origin, and history

Form of Jacob

Deeper origin not confirmed in the cited records

What Jacobus means

Jacobus is a form of Jacob.

Documented naming usage and pronunciation

Jacobus is used in Dutch and Late Roman.

Another recorded pronunciation is /jaː.ˈkoː.bʏs/ for Jacobus.

Meaning behind the documented name family

Jacobus is a form of Jacob. Jacob has more than one origin or interpretation.

Origin, language, and formation

Jacobus is used in Dutch.

Related names and everyday forms

Related names include Jacob.

American usage and historical context

In the United States, 142 boys were recorded with the name Jacobus between 1979 and 2025. Its highest annual count was 8 in 1997; its best national rank was #5,647 in 1979.

Over 5 years its rank rose, from #12,837 in 2020 to #12,773 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Jacobus?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 663,000
5 of 3,315,165 births
Among boys only
1 in 342,000
<0.01% of boys
Rank, 2025
#12,773
of 13,926 boys’ names in use
Coin-flip room size
459,581 kids
Even odds of a second one

Where Jacobus sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 459,581 children born in 2025 and it's an even bet that one of them is another Jacobus. In a class of 30 the chance is Under 1%.

When Jacobuss were born

Half of everyone ever recorded as Jacobus was born before 2003 — so the typical Jacobus is around 22 today.

Median birth year
2003
About 22 years old
Biggest decade
2000s
33.1% of all use
Born in the last 25 years
60.6%
A modern name
Recorded since 1950
142
People you could plausibly meet
Choose a decade

2000s — 33.1% of all recorded uses (47).

Is Jacobus 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
−1,295
Places dropped
Rank vs 5 years ago
+64
Places climbed
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
62.5%
Peak was 1997 (8)
Years since peak
28
Years
Year-to-year steadiness
Shifting
18.5% average annual change
Best rank ever
#5,647
1979

Spellings of Jacobus

Jacobus is not the most common spelling — Jacob is, with 97.9% against Jacobus's 0.01%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Jacobus around the world

Where Jacobus 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 & Wales
    2004–2023
    #4,992
    in 2023
  • Canada
    1998–2019
    #2,583
    in 2019
  • South Australia
    1954–2012
    #771
    in 2012

Popularity data from Office for National Statistics, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Jacobus by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#12,773
Trend vs 5 yrs ago
Up 64
Best rank ever
#5,647
1979
Peak year
1997
8 that year
First recorded
1979
Last recorded
2025
All-time count
142
Count in 2025
5

Names similar to Jacobus

Matched on shared beginnings and endings, similar length, and comparable popularity.

JacieonJacksynJacereJacierJacqueesJacorieJacarriJaceionJacobeyJacquelJaceyonJacksenJacaiJachaiJackmanJacadenJacaerysJacquisJacarieJacionJachinJacariiJachobJacaius

Sibling names for Jacobus

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Jacobus

Top names of 1997, Jacobus's peak yearThe 1990s in fullOther names that peaked in 1979Boys' names starting with JUncommon Dutch Boy Names