Isidoro vs Isidra
American parents have registered 1,292 Isidoros since 1880, against 622 Isidras. But in 2025 it was Isidra that was commoner, 9 babies to fewer than five.
Babies given each name, 1880–2025
Isidoro Isidra
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 110 years in which either name was published, Isidoro for 91 years and Isidra for 19 years. The lead changed hands 24 times.
- 1903–1911 Isidra ahead
- 1913–1916 Isidoro ahead
- 1920–1922 Isidra ahead
- 1925–2023 Isidoro ahead, apart from 7 short spells
14 shorter spells of a year or two are folded into the spans above rather than listed separately.
Side by side
| Isidoro | Isidra | |
|---|---|---|
| Total US births | 1,292 | 622 |
| Most in one year | 24 | 18 |
| Babies in 2025 | under 5 | 9 |
| Estimated living today | 850 | 370 |
| Median age today | 44 | 46 |
| Peak year | 1929 | 1921 |
| Best rank | 1,480th boys | 2,120th girls |
| Rank in 2025 | unranked | 10,107th |
| First recorded | 1913 | 1903 |
| Girls / boys | 0 / 1,292 | 622 / 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 Isidras alive today are over 46; half the Isidoros are over 44. That is 2 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Isidoro Texas (9.4×), California (2.4×)
- Isidra Texas (13.0×)
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: Isidoro and Isidra.