Guilherme

boyGermanicChristian

Guilherme is a Christian boy name of Germanic, via Portuguese origin, meaning “Resolute protector”.

MeaningResolute protector
GenderBoy
OriginGermanic, via Portuguese
Pronunciationgee-LYEHR-mee
TraditionChristian, Modern & Classic
Used inBrazil, Portugal

Meaning and origin of Guilherme

Guilherme is the Portuguese form of William, from the Germanic elements 'wil', will or desire, and 'helm', helmet or protection. It reached Portugal through French Guillaume, the name made famous by William the Conqueror. In Brazil it is one of the steadiest boy names, with Gui as a common nickname. The Brazilian pronunciation softens the final syllable, giving a sound close to 'gee-LYEHR-mee'.

Is Guilherme a Christian name?

Guilherme is not biblical but was borne by medieval saints such as William of Gellone, and is used widely by Catholic families.

How popular is Guilherme?

A very common name in Brazil and familiar in Portugal.

Gifts with the name Guilherme

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Spellings and variants of Guilherme

Names similar to Guilherme

More Christian boy names

Frequently asked questions

What does the name Guilherme mean?

Guilherme means 'Resolute protector'. It is of Germanic, via Portuguese origin.

Is Guilherme a Christian name?

Guilherme is not biblical but was borne by medieval saints such as William of Gellone, and is used widely by Catholic families.

How do you pronounce Guilherme?

Guilherme is pronounced gee-LYEHR-mee.

Is Guilherme a boy or girl name?

Guilherme is usually a boy name.

Updated October 2026. Spotted a mistake? Tell us.