Seiji vs Seirra
American parents have registered 887 Seirras since 1880, against 517 Seijis. But in 2025 it was Seiji that was commoner, 8 babies to fewer than five.
Babies given each name, 1880–2025
Seiji Seirra
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 64 years in which either name was published, Seiji for 41 years and Seirra for 23 years. The lead changed hands 4 times.
Side by side
| Seiji | Seirra | |
|---|---|---|
| Total US births | 517 | 887 |
| Most in one year | 19 | 63 |
| Babies in 2025 | 8 | under 5 |
| Estimated living today | 400 | 870 |
| Median age today | 19 | 27 |
| Peak year | 2007 | 1999 |
| Best rank | 4,808th boys | 2,343rd girls |
| Rank in 2025 | 8,910th | unranked |
| First recorded | 1914 | 1985 |
| Girls / boys | 0 / 517 | 887 / 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 Seirras alive today are over 27; half the Seijis are over 19. That is 8 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Seiji Hawaii (166.5×), California (4.8×)
- Seirra Ohio (11.7×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Compare something else
Social Security Administration birth records, 1880–2025, public domain. Full histories: Seiji and Seirra.