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Kelsy vs Kelvin

American parents have registered 51,855 Kelvins since 1880, against 3,270 Kelsys. Kelvin is still ahead, with 214 babies in 2025.

Babies given each name, 1880–2025

Births per year: Kelsy against Kelvin, 1880 to 2025 0 400 800 1.2k 1.6k 1880 1900 1920 1940 1960 1980 2000 2020

Kelsy Kelvin

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

Kelvin has been the commoner name in every year either was published, 1912 to 2025. The lead has never changed hands.

The closest they came was 1997, when Kelsy had 138 and Kelvin had 598.

Side by side

  Kelsy Kelvin
Total US births 3,27051,855
Most in one year 1681,380
Babies in 2025 16214
Estimated living today 3,20046,000
Median age today 2942
Peak year 19921961
Best rank 1,099th girls209th boys
Rank in 2025 6,838th1,034th
First recorded 19741912
Girls / boys 3,231 / 39304 / 51,551

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 Kelvins alive today are over 42; half the Kelsys are over 29. That is 13 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 Kelsy Kelvin
France 6951,895
England and Wales 731,136
Scotland 12284
Belgium 31117

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: Kelsy and Kelvin.