Seini is a very rare girls' name that peaked in 2010 and has since faded.
Seini is a girl name. In 2025 it ranked #16,871 for girl births in the United States (and #27,910 across all names), given to 5 babies. Seini first appears in 1986 and peaked in 2010 (9 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 5 | 5 | #16,871 |
| 2022 | 5 | 5 | #17,373 |
| 2019 | 5 | 5 | #17,591 |
| 2015 | 5 | 5 | #18,681 |
| 2010 | 9 | 9 | #12,102 |
| 2009 | 5 | 5 | #19,710 |
| 2007 | 6 | 6 | #17,252 |
| 2006 | 5 | 5 | #19,530 |
| 2002 | 5 | 5 | #17,624 |
| 1999 | 5 | 5 | #16,429 |
| 1994 | 5 | — | #15,286 |
| 1991 | 5 | — | #14,925 |
| 1986 | 6 | — | #10,597 |