Kaisyn vs Kaitlin

Babies given each name, 1880–2025

Kaisyn Kaitlin

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 54 years in which either name was published, Kaitlin for 46 years and Kaisyn for 8 years. The lead changed hands once.

• 1971–2017 Kaitlin ahead
• 2018–2025 Kaisyn ahead

Side by side

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 Kaitlins alive today are over 31; half the Kaisyns are over 5. That is 26 years between them: two names in use at the same time, worn by two different generations.

Where each one is strongest

• Kaisyn Louisiana (5.8×), Texas (4.1×), North Carolina (2.8×)
• Kaitlin New Hampshire (1.9×), Alaska (1.6×), Nevada (1.5×)

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.

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

• Kaitlin vs Kaitlyn
• Kaitlin vs Caitlin
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• Kaisyn vs Kai
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• Kaisyn vs Kailey
• Kaisyn vs Kaia
• Kaitlin vs Kai