Girls' name · since 1911
Willo
Since 1911, U.S. Social Security records show 637 babies named Willo, peaking in 1924. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #10,142 of 72,339
- all-time among girls
- #10,159 of 17,297
- 2025 SSA year
- 637
- born since 1911
- 1930s
- peak decade
637 babies have been named Willo since 1911, making it today's #10159 girls' name.
Social Security Administration records show Willo recorded 637 times among girls since 1911, holding rank #10159 nationally today, ahead of 41% of girls, peaking in the 1930s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1911 to 2025.
- #10,142 of 72,339 all-time among girls
- #10,159 of 17,297 2025 SSA year
- 637 born since 1911
- 1930s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Willo ranks #10,142 of 72,339 girls' names by all-time recorded births (highest first) and #10,159 of 17,297 among girls' names in 2025. 637 born since 1911, peaking in the 1930s.
- #10,142 of 72,339
- all-time among girls
- #10,159 of 17,297
- 2025 SSA year
- 637
- born since 1911
- 1930s
- peak decade
Willo's 637 recorded births place it above 85.97% of the 72,339 girls names in the full SSA archive.
The state file records this name in 1 jurisdictions, led by Alabama.
How Willo compares
637 Top 40% higher than 60% of 17,297 names currently given to girls
Based on all-time total births among currently-ranked girls names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Willo's all-time total is 69% above the median girls name, and Olivia still leads by a wide margin.
| Metric | Willo | Median girls name (Kyann) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 637 | 376 | 567,345 |
| Peak-year births | 23 | 21 | 19,840 |
Willo's usage pattern, beyond the headline number
Willo splits its recorded history at 1942: 38% of all births land in the more recent half, 62% in the earlier half, leaning more toward its earlier era than today's. The single quietest year was 1913 (5 births) -- compare that against the 1924 peak of 23 for a sense of just how much the name's popularity has swung.
Willo popularity over time
Annual U.S. births registered with the Social Security Administration · 1911–2025
- Peak year (1924)
- 23
- Annual births at peak, across 115 years of records
Willo by decade
1930s is the heaviest window (166 births, 26% of the file).
1930s was Willo's strongest decade.
166 babies received the name during that ten-year window, about 26% of all-time use.
Willo births by decade
Total births in each ten-year window
- 1910s
1910s
73 births
- 1920s
1920s
147 births
- 1930s
1930s
166 births
- 1940s 63
1940s
63 births
- 1950s 30
1950s
30 births
- 1960s 7
1960s
7 births
- 2000s 38
2000s
38 births
- 2010s
2010s
74 births
- 2020s 39
2020s
39 births
What this shows Peak: 1930s at 166 births (26% of all-time use).
How Willo compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Willo's total volume
Willo by state
Where Willo concentrates geographically, total births since 1911
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Alabama | | 33 | 5.2% |
33 of 637 births nationwide.
Frequently Asked Questions
How popular is the name Willo? ▼
Where does Willo sit in the SSA name archive? ▼
When was Willo most popular? ▼
Where is Willo most popular? ▼
How long has the name Willo been used? ▼
What names are similar to Willo? ▼
What to do with Willo's data
- Willo's decade-level peak was the 1930s (166 total births); usage has since declined to 39 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Alabama records the most Willos (33 births) -- see the full state breakdown if geography matters to your decision. Alabama names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Willo
Nearby Names Like Willo
Names with a similar sound, spelling, or feel to Willo
Compare Willo side by side: Willo vs Willie Willo vs Wilma Willo vs Willow
Related Names
Names with a similar popularity rank to Willo
Nationwide names with similar peak year or record span
Two nationwide peer axes for Willo: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1924)
Similar record span (~114 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, 1911–2025 (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 Willo 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.