The baby name Seiji appears in baby name data for the United States from 1922 to 1929. It was most popular in 1925 with 18 babies given the name.
Over the period shown, Seiji has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1922 | 10 |
| 1923 | 14 |
| 1924 | 10 |
| 1925 | 18 |
| 1929 | 12 |