Editorial coverage
85
This name has strong editorial coverage.
Guillermo Meaning and Origin
Frequently searched name meaning with rising interest.
Guillermo is a masculine name of Spain and Spanish origin.
Quick Facts
| Origin | Spain · Spanish |
| Meaning | Resolute protector. |
| Pronunciation | — |
| Gender | Boy |
| Popularity | Rare but meaningful |
| Syllables | 3 |
Meaning & Origin
The documented meaning is "Resolute protector."
This traces to Spain and Spanish naming traditions.
Today, Guillermo remains uncommon but continues to appear in modern naming records. Year-by-year ranking detail is not documented for this name in the sources we track.
Related spellings and forms of Guillermo include:
Guillermo (English), Guilherme (English)
Style tags: traditional
Historical and linguistic notes
Guillermo belongs to the Spain naming cluster, with roots in Spanish naming traditions. Its syllable structure (3 syllables) places it in a common range for boys, balancing brevity and presence. Names from the same origin cluster often share stylistic cues—formality, phonetic patterns, or generational associations—that influence pairing and sibling harmony. Stylistic positioning—whether a name feels classic, modern, or rare—affects how it pairs with surnames and sibling names. See names like Guillermo for alternatives that share sound, origin, or popularity band. Browse Boy names and by letter for more options.
Similar & Related Names
Names connected to Guillermo by sound, origin, or popularity include the following.
Related: Gabe, Gabryel, Gadiel, Galileo, Gallagher, Gamaliel, Gannon, Gareth
Similar: Gamaliel, Gannon, Gareth, Garner, Garnet
Same origin: Alfonso, Alondra, Alonso, Alvaro, Amaris, Aracely, Armando, Arturo
Same gender: Aadi, Aahil, Aarnav, Aathish, Abbas, Abd, Abdifatah, Abdirahman
Same first letter: Gabby, Gabe, Gabriele, Gabryel, Gabryelle, Gaby, Gadiel, Gael
People also search: Beatriz, Carmen, Catalina, Dolores, Eduardo, Elian
See how Guillermo appears across languages: Guillermo in other languages.
Pairing Ideas
Parents often pair Guillermo with the following middle names and surnames.
- Aj – Edge; corner (as a nickname element).
- An – Peace; quiet; safe.
- Badr – Documented English given name.
- Banks – Documented English given name.
- Bao – Treasure; precious; guarantee.
See how Guillermo pairs with common surnames: Smith, Garcia, Johnson, Williams. Browse last name compatibility. Try the compatibility tool.
Get a single report combining origin, popularity, sibling fit, and middle name ideas for Guillermo.
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- Full origin breakdown
- Popularity trajectory
- Sibling harmony matrix
- Middle name pairing grid
Frequently Asked Questions About Guillermo
What does the name Guillermo mean?
It means "Resolute protector." and comes from Spain and Spanish naming roots. The gloss matches what we show in the quick facts and lead summary above.
Is Guillermo a boy or girl name?
It is usually listed as a boy name in curated records. Usage can differ by region, so confirm the reading you want for your family.
How popular is Guillermo?
We do not have a single global rank for Guillermo on this page. Use the popularity table and chart below for country- and year-specific counts.
Is Guillermo a biblical name?
No — it is not tagged as biblical in our directory. It may still appear in religious families depending on tradition and region.
Is Guillermo a rare name?
Guillermo ranks toward the uncommon side in the lists we publish. Exact rarity depends on country and year—use the table below.
What names are similar to Guillermo?
Similar options to Guillermo include Gamaliel, Gannon, and others in the similar-names list on this page. Open those links for meanings, origins, and popularity in one place.
Get curated baby name ideas
Weekly culturally curated name lists.
Research & Sources
This page's editorial content draws on the following sources, confidence signals, and methodology.
The origin and meaning of the name Guillermo are based on linguistic analysis, historical naming records, and cross-cultural usage patterns.
- Linguistic origin databases
- Historical name usage records
- Cross-cultural naming conventions
- Modern population and popularity datasets
- Etymological dictionaries and language corpora
This page synthesizes linguistic and cultural data to provide a structured overview of the name Guillermo.
How thoroughly this name is documented across editorial knowledge, published sources, and popularity records.
Overall score
95 / 100
Sources cited
10
This information is supported by authoritative published sources.
- Cambridge English Pronouncing Dictionary
- Oxford Dictionary of First Names
0
No popularity data is currently available.
Methodology notes
Name meaning and name origin draw on etymology, historical usage, and cultural adoption. The interpretation here reflects the most widely cited sense for Guillermo. Cultural background and linguistic roots may span more than one region; the quick facts table summarizes the primary attribution. For more names from a similar tradition, use the same-origin and country links below.
When available, the popularity table shows how often Guillermo was registered in a given country and year, often from official birth statistics (e.g. Social Security in the US, ONS in the UK). Rank is the name’s position among all names; count is the number of births. Trends vary by region and year. Browse popular names similar to Guillermo and trending names for more context.
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