Jassen is a very rare variant of Jason that was most common in the 1970s and has all but disappeared.
Jassen is a boy name. It last appears in U.S. records in 2015. Jassen was first reported in SSA data in 1967 and peaked in 1974 (23 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2015 | 5 | 5 | #12,915 |
| 2012 | 5 | 5 | #13,082 |
| 2011 | 5 | 5 | #13,158 |
| 2003 | 5 | 5 | #11,675 |
| 2002 | 6 | 6 | #9,938 |
| 1998 | 5 | 5 | #10,338 |
| 1993 | 5 | — | #9,353 |
| 1989 | 5 | — | #8,454 |
| 1985 | 7 | — | #5,410 |
| 1983 | 6 | — | #5,805 |
| 1982 | 6 | — | #5,967 |
| 1981 | 8 | — | #4,712 |
| 1980 | 20 | — | #2,480 |
| 1979 | 12 | — | #3,446 |
| 1978 | 19 | — | #2,422 |
| 1977 | 20 | — | #2,305 |
| 1976 | 17 | — | #2,551 |
| 1975 | 14 | — | #2,817 |
| 1974 | 23 | — | #1,953 |
| 1973 | 20 | — | #2,079 |
| 1972 | 17 | — | #2,279 |
| 1971 | 13 | — | #2,741 |
| 1970 | 11 | — | #2,973 |
| 1968 | 6 | — | #3,905 |
| 1967 | 6 | — | #3,737 |