Kaj is a boy name with a rare feel, drawn from real birth records.
| Country | Births on record |
|---|---|
| United States since 1880 | 515 births |
| England & Wales since 1996 | 42 births |
| Ireland since 1964 | 3 births |
Counts come from national birth registrations: the U.S. Social Security Administration, England & Wales (ONS) and Ireland (CSO). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Kaj per year — United States (1956–2025). United States peaked in 2006 (20/yr) · England & Wales peaked in 1996 (4/yr) · Ireland peaked in 2023 (3/yr).
Kaj reached its peak in 2006, when it was the #10807 most popular baby name in the United States — making it a quintessential 2000s name.
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