Deirdre vs Deisy
American parents have registered 16,845 Deirdres since 1880, against 3,107 Deisys. But in 2025 it was Deisy that was commoner, 35 babies to 13.
Babies given each name, 1880–2025
Deirdre Deisy
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 103 years in which either name was published, Deirdre for 75 years and Deisy for 28 years. The lead changed hands 3 times.
Side by side
| Deirdre | Deisy | |
|---|---|---|
| Total US births | 16,845 | 3,107 |
| Most in one year | 799 | 137 |
| Babies in 2025 | 13 | 35 |
| Estimated living today | 15,000 | 3,100 |
| Median age today | 56 | 22 |
| Peak year | 1961 | 2006 |
| Best rank | 333rd girls | 1,574th girls |
| Rank in 2025 | 7,885th | 4,067th |
| First recorded | 1921 | 1972 |
| Girls / boys | 16,845 / 0 | 3,107 / 0 |
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 Deirdres alive today are over 56; half the Deisys are over 22. That is 34 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Deirdre New York (3.7×), Massachusetts (3.5×), Connecticut (2.9×)
- Deisy California (4.9×), Texas (3.4×), Arizona (1.8×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Deirdre and Deisy.