Kaj vs Kaja

Babies given each name, 1880–2025

Kaj Kaja

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 58 years in which either name was published, Kaja for 45 years and Kaj for 13 years. The lead changed hands 19 times.

• 1957–1967 Kaja ahead
• 1975–1978 Kaj ahead
• 1980–2025 Kaja ahead, apart from 4 short spells

13 shorter spells of a year or two are folded into the spans above rather than listed separately.

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 Kajas alive today are over 21; half the Kajs are over 19. That is 2 years between them: two names in use at the same time, worn by two different generations.

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

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