Seith is a very rare variant of Seth that was most common in the 1990s and has all but disappeared.
Seith is a boy name. It last appears in U.S. records in 2005. Seith was first reported in SSA data in 1978 and peaked in 1999 (12 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2005 | 5 | 5 | #13,027 |
| 2003 | 6 | 6 | #10,653 |
| 2002 | 6 | 6 | #10,444 |
| 2001 | 8 | 8 | #8,181 |
| 2000 | 6 | 6 | #10,129 |
| 1999 | 12 | 12 | #5,595 |
| 1997 | 6 | — | #9,077 |
| 1996 | 6 | — | #8,835 |
| 1995 | 7 | — | #7,663 |
| 1993 | 7 | — | #7,477 |
| 1992 | 6 | — | #8,281 |
| 1989 | 9 | — | #5,524 |
| 1988 | 8 | — | #5,658 |
| 1987 | 8 | — | #5,374 |
| 1986 | 5 | — | #7,635 |
| 1983 | 6 | — | #6,090 |
| 1979 | 8 | — | #4,783 |
| 1978 | 6 | — | #5,648 |