Is Kaj a boy or girl name?

Kaj is a boy’s name. Of the 515 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Kaj

Recorded 1956–2025 · United States

Kaj was most popular in 2006, when 20 American babies were given the name — ranking #10,486 that year. In 2025 it ranked #24,763, with 5 births. Across 1880–2025 the Social Security Administration has recorded 515 people named Kaj.

Kaj over time

Births per year. The dot marks Kaj’s peak in 2006. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Kaj a boy’s or a girl’s name?

Across the whole record Kaj is a boy’s name — 0.0% of the 515 Americans given it were girls and 100.0% were boys. In births since 2016 it is 0% girls and 100% boys.

Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.

Names that peaked alongside Kaj

Explore further

See Kaj on the interactive charts

Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org