Guilherme
PopularA boy's name meaning resolute protector, helmet of will.
Approved in Portugal. Guilherme is on the official IRN list of names you can register. Was in the national top 20 of 2023/24.
Origin
Of Germanic origin, the Portuguese form of William, from the Frankish Willahelm, formed from the elements willio (will) and helm (helmet, protection).
Story
The name reached Portuguese through Old French Willame, itself derived from Frankish Willahelm. It is a doublet of William, sharing the same root as German Wilhelm and French Guillaume. In Portugal and Brazil, Guilherme has remained among the most given boy names in recent decades, with the short form Gui as a common diminutive.
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Get startedSources & references
- List of admitted given names · IRN · irn.justica.gov.pt (approved-name list & birth statistics)
- Behind the Name · Guilherme
- Wiktionary · Guilherme