Seiji
Recorded for boysMillennial2025 rank
#9,569
up +153 places
2025 births
8
unchanged births
All-time births
517
2% of them in 2025
More common than
83%
of all archived spellings recorded for boys, by lifetime births for that sex
- Peak year
- 2007
- 19 births
- Best rank
- #2,565
- in 1925
- First recorded
- 1914
- #3,212 that year
- Last recorded
- 2025
- still in the data
- Average birth year
- 1987
- weighted by recorded births
- Years recorded
- 60 of 146
- with gaps
Top five years
- 200719#4,951Peak
- 201116#5,636
- 201215#5,942
- 200614#6,041
- 199513#4,739
Rank over time
Inverted scale — nearer the top is more popular. Unrecorded years are left blank, not drawn as zero.
Best rank #2,565 in 1925 · peak births 19 in 2007
Births by decade
Where the name's whole run sits, with the best and worst rank it held in each decade
Trajectory by decade
Where Seiji has ranked, decade by decade
The band spans each decade's best and worst rank; the line follows its best.
The girls' series
No girls have been recorded with this name.
Stated, not plotted as zero — the split bar and the unisex badge are omitted rather than drawn empty.