Girls' name · since 1918
Ailleen
Since 1918, U.S. Social Security records show 21 babies named Ailleen, peaking in 1925. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #45,148 of 72,339
- all-time among girls
- 21
- born since 1918
- 1920s
- peak decade
21 girls have been named Ailleen since 1918, though it isn't currently a top-ranked name.
Social Security Administration records show Ailleen recorded 21 times among girls since 1918, though it doesn't currently rank among the most-used girls names, peaking in the 1920s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1918 to 1925.
- #45,148 of 72,339 all-time among girls
- 21 born since 1918
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Ailleen ranks #45,148 of 72,339 girls' names by all-time recorded births (highest first). 21 born since 1918, peaking in the 1920s.
- #45,148 of 72,339
- all-time among girls
- 21
- born since 1918
- 1920s
- peak decade
Ailleen's 21 recorded births place it above 36.74% of the 72,339 girls names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
Ailleen's usage pattern, beyond the headline number
Divide Ailleen's SSA record in two at 1924 and the more recent half accounts for 52% of all births, the earlier half the remaining 48%, a genuinely balanced usage pattern. Its calmest year was 1918, with only 5 births recorded -- set against the 1925 peak of 6, that's the full swing in one name's fortunes.
Ailleen popularity over time
Annual U.S. births registered with the Social Security Administration · 1918–1925
- Peak year (1925)
- 6
- Annual births at peak, across 8 years of records
Ailleen by decade
1920s is the heaviest window (16 births, 76% of the file).
1920s was Ailleen's strongest decade.
16 babies received the name during that ten-year window, about 76% of all-time use.
Ailleen births by decade
Total births in each ten-year window
- 1910s 5
1910s
5 births
- 1920s
1920s
16 births
What this shows Peak: 1920s at 16 births (76% of all-time use).
Frequently Asked Questions
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Keep exploring Ailleen
Nearby Names Like Ailleen
Names with a similar sound, spelling, or feel to Ailleen
Compare Ailleen side by side: Ailleen vs Aileen Ailleen vs Ailany Ailleen vs Ailani
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Ailleen: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1925)
Similar record span (~7 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 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, 1918–1925 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
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 Ailleen 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 August 2026.