Jac
How to say it: JAK · /ˈdʒæk/
Welsh short form of Jack and Jacob, Hebrew for 'supplanter' - also used in French.
Jac was the 18th most popular boys’ name in the United States in 2025, given to 15 babies (Social Security Administration). The 2020s are its busiest decade so far, its births are steady over ten years, and it is projected to slip to #25 by 2030.
Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #18 |
|---|---|
| Babies born in 2025 | 15 |
| Share of births | 1 in 378 |
| Peak decade | 2020s |
| Change over 10 years | +3% |
| Projected rank for 2030 (estimate) | #25 |
| In France, 2025 | #631 among boys’ names, 0 births |
Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.
Its life, decade by decade
Jac is climbing: the 2020s are already its best decade.
What goes with it
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Jac is about 1 in 16.
Around the world
This spelling is used in Dutch, English, Hebrew, Welsh.
In France: #631 for boys in 2025.
England and Wales: #446.
Famous people named Jac
- Jac Morgan (born 2000)Welsh rugby union player
From Wikidata and Wikipedia
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