Given name
Gillermo
“the determined protector”
Gillermo is a variant of Guillaume. In French use, Guillaume carries the interpretation “the determined protector.”
Original SpanishGuillermo
Meaning & origin
What it means
Gillermo is a variant of Guillaume. In French use, Guillaume carries the interpretation “the determined protector.”
Explained through its name family
The story
Published U.S. birth records include this spelling as early as 1922. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Gillermo through the years
- Babies since 1880
- 633
- 633 boys · 0 girls
- Most popular year
- 1993
- 21 babies
- 2025
- 0
- Outside the ranked list
- 2021–25 vs 2016–20
- —
- Too few births to compare
By the numbers
The most recent published U.S. birth count for boys is 5 in 2011. Later missing counts do not mean the name went unused. Published U.S. population figures for this spelling include 453 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Gillermo’s family of names
In Basque usage, Gillermo was borrowed from the Spanish form Guillermo. Gillermo has a related form in Guillaume.
Inner ring: nicknames and forms · outer: across languages.
Nicknames & forms 1
Diminutives, pet forms, short forms and variants used alongside the name.
Across languages 1
Equivalents and cognates in other languages, plus older forms it grew from.
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