Jillyan is a very rare girls' name that was most common in the 1990s and has all but disappeared.
Jillyan is a girl name. It last appears in U.S. records in 2014. Jillyan was first reported in SSA data in 1978 and peaked in 1999 (17 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2014 | 6 | 6 | #15,482 |
| 2013 | 6 | 6 | #15,466 |
| 2012 | 10 | 10 | #10,798 |
| 2011 | 11 | 11 | #10,021 |
| 2010 | 10 | 10 | #10,780 |
| 2009 | 9 | 9 | #11,902 |
| 2008 | 15 | 15 | #8,313 |
| 2007 | 14 | 14 | #8,751 |
| 2006 | 9 | 9 | #11,875 |
| 2005 | 10 | 10 | #10,480 |
| 2004 | 15 | 15 | #7,589 |
| 2003 | 14 | 14 | #7,759 |
| 2002 | 16 | 16 | #6,858 |
| 2001 | 8 | 8 | #11,470 |
| 2000 | 8 | 8 | #11,201 |
| 1999 | 17 | 17 | #6,035 |
| 1998 | 8 | 8 | #10,540 |
| 1996 | 7 | — | #11,076 |
| 1995 | 6 | — | #12,437 |
| 1993 | 8 | — | #9,986 |
| 1992 | 5 | — | #14,215 |
| 1991 | 6 | — | #12,147 |
| 1990 | 9 | — | #8,801 |
| 1989 | 12 | — | #6,713 |
| 1988 | 5 | — | #12,636 |
| 1986 | 6 | — | #10,058 |
| 1985 | 6 | — | #9,826 |
| 1983 | 9 | — | #6,951 |
| 1982 | 10 | — | #6,560 |
| 1979 | 11 | — | #5,908 |
| 1978 | 5 | — | #10,411 |