Guillermo Name Meaning, Origin and Popularity
Guillermo is predominantly used for boys. The statistics below show this exact spelling in official U.S. records.
How Do You Spell Guillermo?
Guillermo is spelled G-U-I-L-L-E-R-M-O. The name has 9 letters.
Guillermo at a Glance
- Usage
- Predominantly used for boys
- Meaning
- Guillermo is a Spanish form of the name William, meaning “resolute protector” or “strong-willed warrior.”
- Origin
- Guillermo is commonly associated with Spanish-speaking cultures as the equivalent of the English name William.
- Pronunciation
- gee-YER-mo · 3 syllables
Guillermo Popularity in 2025
Rank#901
Recorded Births264
- Boys usage fell 70 places to #901 and recorded 35 fewer births compared with 2024.
Figures reflect this exact spelling in the latest available U.S. Social Security Administration records. See the complete year-by-year trend.
What Does the Name Guillermo Mean?
Guillermo is a Spanish form of the name William, meaning “resolute protector” or “strong-willed warrior.”
Origin: Guillermo is commonly associated with Spanish-speaking cultures as the equivalent of the English name William.
How Do You Pronounce Guillermo?
Pronunciationgee-YER-mo
Syllables3
What Is the History of the Name Guillermo?
- History
- The name Guillermo has been used in Spanish-speaking regions for several centuries and appears in historical and literary sources as a personal name.
Guillermo Popularity by Year
The table below shows the most recent available records for this exact spelling from 2003 through 2025. Use the full history page to explore every recorded year.
| Year | Usage Category | Recorded Births | National Rank |
|---|---|---|---|
| 2025 | Boys | 264 | #901 |
| 2024 | Boys | 299 | #831 |
| 2023 | Boys | 294 | #833 |
| 2022 | Boys | 287 | #848 |
| 2021 | Boys | 299 | #811 |
| 2020 | Boys | 275 | #832 |
| 2019 | Boys | 320 | #747 |
| 2018 | Boys | 314 | #751 |
| 2017 | Boys | 289 | #795 |
| 2016 | Boys | 322 | #754 |
| 2015 | Boys | 389 | #661 |
| 2014 | Boys | 376 | #676 |
| 2013 | Boys | 348 | #688 |
| 2012 | Boys | 392 | #619 |
| 2011 | Boys | 408 | #604 |
| 2010 | Boys | 457 | #553 |
| 2009 | Boys | 534 | #507 |
| 2008 | Boys | 583 | #476 |
| 2007 | Boys | 610 | #454 |
| 2006 | Girls | 5 | #17,168 |
| 2006 | Boys | 621 | #439 |
| 2005 | Boys | 616 | #434 |
| 2004 | Boys | 639 | #406 |
| 2003 | Boys | 595 | #428 |
When Was Guillermo Most Popular?
Peak years are based on the highest recorded birth totals for this exact spelling and usage category. They are ordered by birth count, not chronologically.
1998 · Boys
693 recorded births
National rank #369
1996 · Boys
692 recorded births
National rank #352
1994 · Boys
675 recorded births
National rank #357
1999 · Boys
665 recorded births
National rank #387
Where Guillermo Ranked Highest in 2025
State rankings are calculated separately for girls and boys within each state. The SSA omits state-level names recorded fewer than five times, so low visible counts can still represent a relatively high state rank.
Top States for Boys
| State | Rank | Recorded Births |
|---|---|---|
| AZ | #432 | 17 |
| CA | #509 | 60 |
| NV | #516 | 5 |
| TX | #519 | 64 |
| WA | #639 | 10 |
| MN | #718 | 6 |
| CO | #756 | 6 |
| IL | #870 | 9 |