boy's name
Guillermo
- Origin Spanish
- Gender Boy
- Syllables 3
- Letters 9
- Popularity Top 1000 (US)
- Births on record 32,626
the United States
#901
2025 births
Guillermo is a boy's name with 3 syllables. In 2025 it was given to 264 babies in the United States, ranking #901. It is a well-established, commonly used name.
- Guillermo is a name of Spanish origin.
- Peaked in 1998, when 693 babies were given the name.
- It has been falling over the past decade.
- Today about 1 in 12,558 babies in the United States is given this name.
- First appears in US birth records in 1885.
- 3 syllables, with the stress on syllable 2.
Guillermo over time
Births per decade in the United States, 1880s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1880s | 5 |
| 1890s | 13 |
| 1900s | 44 |
| 1910s | 253 |
| 1920s | 821 |
| 1930s | 783 |
| 1940s | 943 |
| 1950s | 1,495 |
| 1960s | 2,112 |
| 1970s | 3,362 |
| 1980s | 4,388 |
| 1990s | 6,496 |
| 2000s | 6,100 |
| 2010s | 3,615 |
| 2020s (to 2025) | 1,718 |
How popular is Guillermo?
In 2025, Guillermo was given to 264 babies in the United States, ranking #901 that year. It is a well-established, commonly used name.
Where Guillermo is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names that peaked alongside Guillermo
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Guillermo also like
Names whose popularity has risen and fallen in step with Guillermo over the last century — the same taste, a different name.
Guillermo in other languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
Sibling names for Guillermo
Names from the same era that won't rhyme or share an initial with Guillermo — the two things that make a sibling set grate.
Common questions about Guillermo
How popular is the name Guillermo?
In 2025, Guillermo was given to 264 babies in the United States, ranking #901 that year. It is a well-established, commonly used name.
Is Guillermo a girl's or a boy's name?
Guillermo is given almost entirely to boys in birth records.
How many syllables are in Guillermo?
Guillermo has 3 syllables.
When was Guillermo most popular?
Guillermo peaked in 1998, when 693 babies were given the name. It has been falling over the past decade.
Is Guillermo a good name?
That is not something records can settle, but they can tell you what you would be choosing. Guillermo currently ranks #901 in the United States. It has been falling over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.