Girls' name · since 1915
Dilys
Dilys has 20 recorded births since 1915 in federal Social Security data, most heavily in 1915 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #45,917 of 72,339
- all-time among girls
- 20
- born since 1915
- 1940s
- peak decade
Dilys is not among the current top-ranked girls names; 20 have been recorded since 1915.
Dilys has 20 recorded births among girls since 1915, per the U.S. Social Security Administration, though it falls outside today's most-used girls names, busiest in the 1940s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1915 to 1946.
- #45,917 of 72,339 all-time among girls
- 20 born since 1915
- 1940s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Dilys ranks #45,917 of 72,339 girls' names by all-time recorded births (highest first). 20 born since 1915, peaking in the 1940s.
- #45,917 of 72,339
- all-time among girls
- 20
- born since 1915
- 1940s
- peak decade
Dilys's 20 recorded births place it above 35.98% of the 72,339 girls names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
Dilys's usage pattern, beyond the headline number
Divide Dilys's SSA record in two at 1943 and the more recent half accounts for 50% of all births, the earlier half the remaining 50%, a genuinely balanced usage pattern. Its calmest year was 1915, with only 5 births recorded.
Dilys popularity over time
Annual U.S. births registered with the Social Security Administration · 1915–1946
- Peak year (1915)
- 5
- Annual births at peak, across 32 years of records
Dilys by decade
1940s is the heaviest window (10 births, 50% of the file).
1940s was Dilys's strongest decade.
10 babies received the name during that ten-year window, about 50% of all-time use.
Dilys births by decade
Total births in each ten-year window
- 1910s
1910s
5 births
- 1920s
1920s
5 births
- 1940s
1940s
10 births
What this shows Peak: 1940s at 10 births (50% of all-time use).
Frequently Asked Questions
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Keep exploring Dilys
Nearby Names Like Dilys
Names with a similar sound, spelling, or feel to Dilys
Compare Dilys side by side: Dilys vs Dillon Dilys vs Dillie Dilys vs Dilara
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Dilys: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1915)
Similar record span (~31 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, 1915–1946 (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 Dilys 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.