Girls' name · since 1978
Jillyan
Since 1978, U.S. Social Security records show 291 babies named Jillyan, peaking in 1999. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 291
- total births
- 1978–2014
- years on record
- 2000s
- peak decade
- 41%
- born in that decade
Jillyan sits outside today's top ranks for girls, with 291 recorded since 1978.
According to the U.S. Social Security Administration, Jillyan has been recorded 291 times among girls since 1978, though it is not among the currently most-used girls names, with its heaviest use in the 2000s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1978 to 2014.
- 291 total births
- 1978–2014 years on record
- 2000s peak decade
- 41% born in that decade
Data updated Jul 2026
Jillyan's 291 recorded births place it above 78% of the 72,339 girls names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
Jillyan's usage pattern, beyond the headline number
Divide Jillyan's SSA record in two at 1999 and the more recent half accounts for 61% of all births, the earlier half the remaining 39%, consistent with a name still gaining ground rather than fading. Its calmest year was 1978, with only 5 births recorded -- set against the 1999 peak of 17, that's the full swing in one name's fortunes.
Jillyan popularity over time
Annual U.S. births registered with the Social Security Administration · 1978–2014
- Peak year (1999)
- 17
- Annual births at peak, across 37 years of records
Jillyan by decade
Total births in each ten-year window, peak vs trough at a glance
2000s was Jillyan's strongest decade.
118 babies received the name during that ten-year window, about 41% of all-time use.
Jillyan births by decade
Total births in each ten-year window
- 1970s 16
1970s
16 births
- 1980s
1980s
48 births
- 1990s
1990s
66 births
- 2000s
2000s
118 births
- 2010s 43
2010s
43 births
What this shows Peak: 2000s at 118 births (41% of all-time use).
Frequently Asked Questions
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What to do with Jillyan's data
- Jillyan's usage has stayed within range of its 2000s decade-level peak (118 total births) through the 2010s (43) -- a comparatively stable name, not a fading trend.
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Jillyan
Nearby Names Like Jillyan
Names with a similar sound, spelling, or feel to Jillyan
Compare Jillyan side by side: Jillyan vs Jill Jillyan vs Jillian Jillyan vs Jilian
Related Names
Names with a similar number of total births
Data Sources
Data as of July 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1978–2014 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac. "Jillyan: Baby Name Since 1978 - 291 Births, Peak 1999." NameAlmanac. Accessed via https://namealmanac.com/name/jillyan. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Jillyan draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of July 2026.