Is Kei a boy or girl name?

Kei is a unisex name. Of the 837 Americans recorded with the name since 1880, 22.2% were girls and 77.8% were boys.

Kei

Recorded 1920–2025 · United States

Kei was most popular in 2015, when 40 American babies were given the name — ranking #6,498 that year. In 2025 it ranked #12,918, with 14 births. Across 1880–2025 the Social Security Administration has recorded 837 people named Kei.

Kei over time

Births per year. The dot marks Kei’s peak in 2015. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Kei a boy’s or a girl’s name?

Across the whole record Kei is a unisex name — 22.2% of the 837 Americans given it were girls and 77.8% were boys. In births since 2016 it is 8% girls and 92% 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 Kei

Where Kei is most concentrated

How much more common the name is in each state than across the country as a whole.

California 9.9×

Explore further

See Kei on the interactive charts

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