Name Awesome

Jac

#5,964 in 2025Boys' name

Possibly heel of the foot, through Jack

Jac has been given to 615 babies in the U.S. since 1915. In 2025 it ranked #5,964 of 13,926 boys’ names in use. Its peak year was 1956, with 18 recorded.

Babies named Jac, 2025

1 in 221,000

Jac over time, 1880–2025

Boys
0510152018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Jac: meaning, origin, and history

Possibly heel of the foot, through Jack

Deeper origin not confirmed in the cited records

What Jac means

Jac belongs to the name family reached through Jac → Jack → Jacques → Ἰάκωβος. Its meaning is “heel of the foot”.

Origin, language, and formation

Jac is used in Welsh.

Jac comes through English Jack.

Related names and everyday forms

Related names include Jack, Jacques and Ἰάκωβος.

Pronunciation and spelling

In Welsh, Jac is pronounced /d͡ʒak/.

American usage and historical context

In the United States, 615 boys were recorded with the name Jac between 1915 and 2025. Its highest annual count was 18 in 1956; its best national rank was #1,896 in 1952.

Over 5 years its rank rose, from #9,044 in 2020 to #5,964 in 2025. Over 10 years its rank rose, from #9,067 in 2015 to #5,964 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 Jac?

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

Among all babies, 2025
1 in 221,000
15 of 3,315,165 births
Among boys only
1 in 114,000
<0.01% of boys
Rank, 2025
#5,964
of 13,926 boys’ names in use
Coin-flip room size
153,194 kids
Even odds of a second one

Where Jac 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 153,194 children born in 2025 and it's an even bet that one of them is another Jac. In a class of 30 the chance is Under 1%.

When Jacs were born

Half of everyone ever recorded as Jac was born before 1973 — so the typical Jac is around 52 today.

Median birth year
1973
About 52 years old
Biggest decade
1950s
19.0% of all use
Born in the last 25 years
42.1%
Spread across generations
Recorded since 1950
519
People you could plausibly meet
Choose a decade

1950s — 19.0% of all recorded uses (117).

Is Jac 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
+1,486
Places climbed
Rank vs 5 years ago
+3,080
Places climbed
Rank vs 10 years ago
+3,103
Places climbed
Births vs 10 years ago
1.88×
More babies than then
Share of its own peak
83.3%
Peak was 1956 (18)
Years since peak
69
Years
Year-to-year steadiness
Volatile
38.0% average annual change
Best rank ever
#1,896
1952

Jac around the world

Where Jac 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
    1996–2025
    #444
    in 2025
  • Scotland
    1999–2017
    #532
    in 2017
  • Northern Ireland
    2004–2011
    #311
    in 2011
  • France
    1929–1929
    #973
    in 1929
  • South Australia
    1994–2007
    #680
    in 2007

Popularity data from Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency, Institut national de la statistique et des études économiques and Consumer and Business Services (South Australia). ONS, NRS, NISRA data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. CBS SA data under CC BY 4.0.

Jac by the numbers

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

As a boy's name

Rank in 2025
#5,964
Trend vs 5 yrs ago
Up 3,080
Best rank ever
#1,896
1952
Peak year
1956
18 that year
First recorded
1915
Last recorded
2025
All-time count
615
Count in 2025
15

Names similar to Jac

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

JacekJacyJachinJacionJachaiJacoriJacaiJacielJacenJaceonJacoryJaceyJacobeJacksenJaceyonJaceionJacarriJaccobJackeyJacqueJacereJacksynJacariJacier

Sibling names for Jac

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 Jac

Top names of 1956, Jac's peak yearThe 1950s in fullOther names that peaked in 1952Boys' names starting with JWelsh Boy Names