Cosimo vs Cosmo

Babies given each name, 1880–2025

Cosimo Cosmo

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 116 years in which either name was published, Cosmo for 111 years and Cosimo for 5 years. The lead changed hands 8 times.

• 1910–1967 Cosmo ahead
• 1968 Cosimo ahead
• 1969–1976 Cosmo ahead
• 1977 Cosimo ahead
• 1978–1979 Cosmo ahead
• 1980 Cosimo ahead
• 1981–1986 Cosmo ahead
• 1987–1988 Cosimo ahead
• 1989–2025 Cosmo 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 Cosimos alive today are over 32; half the Cosmos are over 20. That is 12 years between them: two names in use at the same time, worn by two different generations.

Where each one is strongest

• Cosimo New York (9.5×), New Jersey (2.8×), Pennsylvania (2.1×)
• Cosmo New York (7.2×), Massachusetts (3.3×), New Jersey (2.1×)

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

• Cosimo vs Cosette
• Cosimo vs Cosme
• Cosmo vs Cosette
• Cosmo vs Cosme