Jillann is a very rare variant of Jillian that was most common in the 1960s and has all but disappeared.
Jillann is a girl name. It last appears in U.S. records in 1989. Jillann was first reported in SSA data in 1961 and peaked in 1967 (10 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1989 | 6 | — | #11,436 |
| 1986 | 5 | — | #11,684 |
| 1983 | 5 | — | #10,956 |
| 1982 | 5 | — | #11,197 |
| 1980 | 6 | — | #9,571 |
| 1978 | 8 | — | #7,230 |
| 1977 | 9 | — | #6,544 |
| 1976 | 8 | — | #6,877 |
| 1972 | 8 | — | #6,195 |
| 1971 | 7 | — | #6,896 |
| 1970 | 5 | — | #8,528 |
| 1968 | 8 | — | #5,330 |
| 1967 | 10 | — | #4,427 |
| 1966 | 5 | — | #6,996 |
| 1965 | 9 | — | #4,633 |
| 1964 | 8 | — | #5,190 |
| 1963 | 7 | — | #5,564 |
| 1961 | 7 | — | #5,532 |