Guillermo
Guillermo is the Spanish form of the male given name William. The name is also commonly shortened to Guille.
- Spanish
Meaning & Origin of Guillermo
What this name means, where it came from, and how it has traveled across cultures.
Guillermo is the Spanish form of the male given name William. The name is also commonly shortened to Guille.
Source: Wikipedia (CC BY-SA 3.0). Read more →
Cultural Origins (via Behind the Name)
- Spanish
The Story of Guillermo
Guillermo first appeared in U.S. Social Security Administration records as a baby boy name in 1885, with 5 babies given the name that year. The name hit its high-water mark in 1998: 693 births, good for #369 nationwide. The 1990s were its strongest decade, accounting for roughly 20% of all recorded Guillermos. In the latest 2026 data it stands at #830 among baby boy names with 300 births, holding steady (-2%). In total, more than 32K Guillermos have been born in the U.S. since records began in 1880, spanning the 1880s through the 2020s.
Popularity Over Time
Popularity by State
Notable people named Guillermo
A small selection from Wikipedia. Tap "Read more" below to see the full list on Wikipedia.
- Guillermo Amador (1974–), American musician
- Guillermo Amor (1967–), Spanish footballer
- Guillermo Arévalo (1952–), a Shipibo shaman and curandero (healer) of the Peruvian Amazon ( Shipibo : Kestenbetsa )
- Guillermo Barros Schelotto (1973–), Argentine footballer
- Guillermo Bermejo (1975–), Peruvian politician
- Guillermo C. Blest (1800–1884), Anglo-Irish physician settled in Chile
- Guillermo Cañas , Argentine tenniser
- Guillermo Cañedo , Mexican businessman
Source: Wikipedia (CC BY-SA 3.0). Read more →
Names that sound like Guillermo
Phonetically similar names — useful when Guillermo is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
- Gillion
- Grillion
- Aguilera
- Calero
- Galleri
- Cajero
- Squillions
- Salguero
- Silguero
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Guillermo
What does the name Guillermo mean?
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How popular is Guillermo in 2026?
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Is Guillermo a unisex name?
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About the name Guillermo
Guillermo is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1885 and has accumulated 32K births in the dataset. Guillermo's peak popularity came in 1998 when it ranked #352. Use the chart and map above to compare Guillermo's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 1998 →
- Names of the 1990s →
- 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.