Jillyan
Jillyan was last recorded in 2014, when 6 babies were given it; 291 Americans have been recorded with it between 1978 and 2014 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Jillyan by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Jillyan?
Unranked in 2025
Its last girls’ rank on record is #15,476, in 2014; SSA lists a name only in years with 5 or more births.
17 babies in 1999, the peak
Jillyan peaked in 1999, when 17 girls were given it, #6,029 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2014 | 6 | #15,476 | 3.4 |
| 2013 | 6 | #15,461 | 3.4 |
| 2012 | 10 | #10,792 | 5.7 |
| 2011 | 11 | #10,017 | 6.3 |
| 2010 | 10 | #10,774 | 5.6 |
| 2009 | 9 | #11,896 | 4.9 |
| 2008 | 15 | #8,309 | 7.9 |
| 2007 | 14 | #8,747 | 7.3 |
| 2006 | 9 | #11,870 | 4.7 |
| 2005 | 10 | #10,474 | 5.4 |
Every recorded year (31)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2004 | 15 | #7,584 | 8.2 |
| 2003 | 14 | #7,754 | 7.7 |
| 2002 | 16 | #6,852 | 8.9 |
| 2001 | 8 | #11,463 | 4.4 |
| 2000 | 8 | #11,193 | 4.4 |
| 1999 | 17 | #6,029 | 9.6 |
| 1998 | 8 | #10,533 | 4.5 |
| 1996 | 7 | #11,071 | 4.0 |
| 1995 | 6 | #12,432 | 3.4 |
| 1993 | 8 | #9,980 | 4.4 |
| 1992 | 5 | #14,207 | 2.7 |
| 1991 | 6 | #12,140 | 3.2 |
| 1990 | 9 | #8,795 | 4.7 |
| 1989 | 12 | #6,707 | 6.5 |
| 1988 | 5 | #12,629 | 2.8 |
| 1986 | 6 | #10,053 | 3.5 |
| 1985 | 6 | #9,821 | 3.5 |
| 1983 | 9 | #6,949 | 5.4 |
| 1982 | 10 | #6,558 | 5.9 |
| 1979 | 11 | #5,907 | 6.9 |
| 1978 | 5 | #10,409 | 3.3 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Jillyan a boy’s or a girl’s name?
Jillyan has been recorded only for girls: SSA lists no boys with the name in 31 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Jillyan: the SSA national file counts each sex separately.
How many people are named Jillyan, and how old are they?
An estimated 286 Americans named Jillyan and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 24 years old and half are between 19 and 35. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 297 people named Jillyan (297 women and girls, 0 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 287 born in the U.S. The Census count is 3% above that prediction.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Jillyan is a less common spelling of Jillian: SSA has recorded 291 Jillyan and 83,424 Jillian since 1880.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Jillyan
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.