Boy Name · Germanic Origin
Guillermo
Last reviewed: June 2026
Guillermo — a boy name from the Germanic tradition — is an uncommon, standout choice. Its meaning, "Resolute protector", anchors the name in something deeper than sound alone. If Gillermo is on your shortlist, Guillermo belongs in the same conversation.
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Frequently asked about Guillermo
What does the name Guillermo mean?
Guillermo means "Resolute protector" and is of Germanic origin.
What is the origin of Guillermo?
Guillermo originates in Germanic naming tradition. Names of Germanic origin often share recognizable sounds and cultural roots that shape how the name reads today.
How do you pronounce Guillermo?
Guillermo has 9 letters and is most commonly stressed on the first syllable. Tap the pronunciation player on this page to hear it spoken aloud.
Is Guillermo a boy's or girl's name?
Guillermo is primarily used as a boy's name in US records, though usage can vary by region and era.
How popular is Guillermo in 2026?
In our 2026 popularity tracker, Guillermo sits in the Rare tier — an uncommon, standout choice.
What names are similar to Guillermo?
Names that share Guillermo's sound and style include Gillermo, Guillermina, Geronimo, Gaylord, Guilford. Open the "Names like Guillermo" rail on this page for the full list.