Humanverse

Kay vs Kayden

American parents have registered 102,545 Kays since 1880, against 81,717 Kaydens. But in 2025 it was Kayden that was commoner, 2,735 babies to 47.

Babies given each name, 1880–2025

Births per year: Kay against Kayden, 1880 to 2025 0 1.5k 3k 4.5k 6k 1880 1900 1920 1940 1960 1980 2000 2020

Kay Kayden

Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.

Who was ahead

Of the 142 years in which either name was published, Kay for 112 years and Kayden for 30 years. The lead changed hands once.

Side by side

  Kay Kayden
Total US births 102,54581,717
Most in one year 3,7185,136
Babies in 2025 472,735
Estimated living today 62,00081,000
Median age today 7310
Peak year 19422014
Best rank 75th girls90th boys
Rank in 2025 3,903rd135th
First recorded 18821989
Girls / boys 98,621 / 3,9248,111 / 73,606

A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.

Which name is older

Half of the Kays alive today are over 73; half the Kaydens are over 10. That is 63 years between them: two names in use at the same time, worn by two different generations.

Where each one is strongest

How much commoner the name is in that state than it is nationally, from births recorded since 1910.

Both names abroad

Countries whose statistics office publishes both names, so the comparison can be made somewhere other than the United States.

Country Kay Kayden
England and Wales 4728,571
France 705,640
Scotland 5661,310
New Zealand 1,205174
Ireland 231,010
Belgium 150331
Switzerland 235137
Poland 134

Every spelling a country files separately is added together, over whatever years that country publishes — which is not the same range in any two of them, so read the columns against each other and not the rows.

Compare something else

Related comparisons

Social Security Administration birth records, 1880–2025, public domain. Full histories: Kay and Kayden.