Boys' name · since 1921
Guilherme
Guilherme has 522 recorded births since 1921 in federal Social Security data, most heavily in 2006 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #7,699 of 45,481
- all-time among boys
- #9,005 of 13,930
- 2025 SSA year
- 522
- born since 1921
- 2000s
- peak decade
522 babies have been named Guilherme since 1921, making it today's #9005 boys' name.
According to the U.S. Social Security Administration, Guilherme has been recorded 522 times among boys since 1921, currently ranked #9005 nationally and more common than 35% of boys, 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 1921 to 2025.
- #7,699 of 45,481 all-time among boys
- #9,005 of 13,930 2025 SSA year
- 522 born since 1921
- 2000s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Guilherme ranks #7,699 of 45,481 boys' names by all-time recorded births (highest first) and #9,005 of 13,930 among boys' names in 2025. 522 born since 1921, peaking in the 2000s.
- #7,699 of 45,481
- all-time among boys
- #9,005 of 13,930
- 2025 SSA year
- 522
- born since 1921
- 2000s
- peak decade
Guilherme's 522 recorded births place it above 83.05% of the 45,481 boys names in the full SSA archive.
The state file records this name in 4 jurisdictions, led by Massachusetts.
How Guilherme compares
522 Top 43% higher than 57% of 13,930 names currently given to boys
Based on all-time total births among currently-ranked boys 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
Guilherme's all-time total is 41% above the median boys name, and Liam still leads by a wide margin.
| Metric | Guilherme | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 522 | 369 | 358,536 |
| Peak-year births | 39 | 34 | 22,252 |
Guilherme's usage pattern, beyond the headline number
Splitting Guilherme's full recorded timeline at 2007, 55% of its total births fall in the more recent half of the record versus 45% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1995, with just 5 recorded births -- worth weighing against the 2006 peak of 39 to see the full range of the name's swing in popularity.
Guilherme popularity over time
Annual U.S. births registered with the Social Security Administration · 1921–2025
- Peak year (2006)
- 39
- Annual births at peak, across 105 years of records
Guilherme by decade
2000s is the heaviest window (257 births, 49% of the file).
2000s was Guilherme's strongest decade.
257 babies received the name during that ten-year window, about 49% of all-time use.
Guilherme births by decade
Total births in each ten-year window
- 1920s 6
1920s
6 births
- 1980s 6
1980s
6 births
- 1990s 63
1990s
63 births
- 2000s
2000s
257 births
- 2010s
2010s
149 births
- 2020s 41
2020s
41 births
What this shows Peak: 2000s at 257 births (49% of all-time use).
How Guilherme compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 boys names closest to Guilherme's total volume
Guilherme by state
Where Guilherme concentrates geographically, total births since 1921
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Massachusetts | | 157 | 30.1% |
| #2 | New Jersey | | 16 | 3.1% |
| #3 | Connecticut | | 15 | 2.9% |
| #4 | Florida | | 10 | 1.9% |
157 of 522 births nationwide. Compared to a flat distribution across 4 reporting states.
Frequently Asked Questions
How popular is the name Guilherme? ▼
Where does Guilherme sit in the SSA name archive? ▼
When was Guilherme most popular? ▼
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What to do with Guilherme's data
- Guilherme's decade-level peak was the 2000s (257 total births); usage has since declined to 41 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Massachusetts records the most Guilhermes (157 births) -- see the full state breakdown if geography matters to your decision. Massachusetts names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Guilherme
Nearby Names Like Guilherme
Names with a similar sound, spelling, or feel to Guilherme
Compare Guilherme side by side: Guilherme vs Guillermo Guilherme vs Guido Guilherme vs Guilford
Related Names
Names with a similar popularity rank to Guilherme
Nationwide names with similar peak year or record span
Two nationwide peer axes for Guilherme: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2006)
Similar record span (~104 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, 1921–2025 (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 Guilherme 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.