Sondra vs Sonja
American parents have registered 39,557 Sonjas since 1880, against 27,074 Sondras. Sonja is still ahead, with 37 babies in 2025.
Babies given each name, 1880–2025
Sondra Sonja
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 115 years in which either name was published, Sonja for 89 years and Sondra for 26 years. The lead changed hands 8 times.
Side by side
| Sondra | Sonja | |
|---|---|---|
| Total US births | 27,074 | 39,557 |
| Most in one year | 897 | 1,343 |
| Babies in 2025 | 7 | 37 |
| Estimated living today | 19,000 | 32,000 |
| Median age today | 63 | 57 |
| Peak year | 1942 | 1968 |
| Best rank | 219th girls | 222nd girls |
| Rank in 2025 | 11,932nd | 3,903rd |
| First recorded | 1912 | 1906 |
| Girls / boys | 27,074 / 0 | 39,513 / 44 |
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 Sondras alive today are over 63; half the Sonjas are over 57. That is 6 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Sondra Kansas (3.1×), Indiana (2.4×), Missouri (2.0×)
- Sonja Minnesota (2.2×), North Dakota (2.0×), Washington (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: Sondra and Sonja.