Guilherme
Guilherme is a Portuguese given name, equivalent to William in English. The feminine form of this name is Guilhermina. Diminutive forms include Guilhermino. Vilma is another female variant of the name.
- Portuguese
Meaning & Origin of Guilherme
What this name means, where it came from, and how it has traveled across cultures.
Guilherme is a Portuguese given name, equivalent to William in English. The feminine form of this name is Guilhermina. Diminutive forms include Guilhermino. Vilma is another female variant of the name.
Source: Wikipedia (CC BY-SA 3.0). Read more →
Cultural Origins (via Behind the Name)
- Portuguese
The Story of Guilherme
Guilherme first appeared in U.S. Social Security Administration records as a baby boy name in 1921, with 6 babies given the name that year. The name hit its high-water mark in 2006: 39 births, good for #2,881 nationwide. The 2000s were its strongest decade, accounting for roughly 50% of all recorded Guilhermes. Its most recent appearance in the national data came in 2024 (5 births); the name has since faded from the published rankings. In total, more than 514 Guilhermes have been born in the U.S. since records began in 1880, spanning the 1920s through the 2020s.
Popularity Over Time
Popularity by State
Variants & Related Forms of Guilherme
Foreign forms, alternate spellings, and nicknames that share roots with Guilherme. Linked entries have a profile on Peek a Name.
- Gui
Names that sound like Guilherme
Phonetically similar names — useful when Guilherme is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Guilherme
What does the name Guilherme mean?
What is the origin of the name Guilherme?
How popular is Guilherme in 2026?
When was Guilherme most popular?
In which U.S. states is Guilherme most popular?
Is Guilherme a unisex name?
What names go well with Guilherme?
What are nicknames or variants of Guilherme?
About the name Guilherme
Guilherme is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1921 and has accumulated 514 births in the dataset. Guilherme's peak popularity came in 2006 when it ranked #2,881. Use the chart and map above to compare Guilherme's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 2006 →
- Names of the 2000s →
- Names starting with "G" →
- Browse all boy names →
- Top names of 2026 →
Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.