Guilherme
A boy's name meaning resolute protector, helmet of will.
Approved in Estados Unidos. Guilherme is on the official SSA list of names you can register. 100 births registered in 2016–2025.
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
- Baby Names from Social Security Card Applications · SSA · ssa.gov (approved-name list & birth statistics)
- Behind the Name · Guilherme
- Wiktionary · Guilherme