Cosmo vs Costanzo
American parents have registered 2,955 Cosmos since 1880, against 12 Costanzos. Cosmo is still ahead, with 80 babies in 2025.
Babies given each name, 1880–2025
Cosmo Costanzo
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
Cosmo has been the commoner name in every year either was published, 1910 to 2025. The lead has never changed hands.
The closest they came was 1928, when Cosmo had 43 and Costanzo had 7.
Side by side
| Cosmo | Costanzo | |
|---|---|---|
| Total US births | 2,955 | 12 |
| Most in one year | 105 | 7 |
| Babies in 2025 | 80 | under 5 |
| Estimated living today | 1,800 | 1 |
| Median age today | 20 | 93 |
| Peak year | 2022 | 1928 |
| Best rank | 1,706th boys | 3,357th boys |
| Rank in 2025 | 1,932nd | unranked |
| First recorded | 1910 | 1928 |
| Girls / boys | 6 / 2,949 | 0 / 12 |
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 Costanzos alive today are over 93; half the Cosmos are over 20. That is 73 years between them: two names in use at the same time, worn by two different generations.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Cosmo and Costanzo.