William

Resolute protector — a boy name of Germanic origin

GenderBoy
OriginGermanic
MeaningResolute protector
PronunciationWIL-yum

Popularity of William in the United States

#9Rank in 2025
10,545Births in 2025
#2 in 1880Peak Popularity
↓ Declining10-Year Trend

Data: U.S. Social Security Administration (SSA). Based on all Social Security card applications for births in the United States.

Meaning & Origin of William

William derives from the Old Germanic name Willahelm, composed of "wil" (will, desire) and "helm" (helmet, protection). The name was brought to England by William the Conqueror after the Norman invasion of 1066, and it quickly became the most popular name among English royalty and commoners alike. Four English kings bore the name, and it has remained in the top tier of boy names for nearly a thousand years. William is one of the few names that has never fallen out of fashion in the English-speaking world, consistently ranking in the top 20 in the United States and United Kingdom.

William Around the World

William is used in 2 languages worldwide, with 40+ international variants.

Languages
EnglishDutch
Details

TypeMale given name

International Variants
VilhoFinnish
GuilhermePortuguese
GuglielmoItalian
GuillemCatalan
LiamIrish
VilmosHungarian
VilémCzech
WilhelmGerman
VilhelmIcelandic
ViljamiFinnish
ViljoFinnish
WillemFrench
GuillermoSpanish
GulielmusLatin
Will
BillEnglish
GuillénAragonese
GuillaumeFrench
Gwyllym
GwilymWelsh
Ghilherme
ViljemSlovene
WiliamPolish
Giliam
Guiliam
Gwilherm
GuilhemOccitan
WiremuMāori
Viliamu
WilliamsEnglish
Viljammultiple languages
GoulielmosGreek
Villiam
GuillermeGalician
WillimEnglish
WeilianChinese
Willjam
LliamAustralian English
VilyamAzerbaijani
WillamWelsh

Linguistic data: Wikidata (CC0). Variants and language usage may vary by region.

Nicknames for William

WillBillBillyLiam

Famous People Named William

  • William Shakespeare — English playwright and poet
  • Prince William — Duke of Cambridge and heir to the British throne
  • William Faulkner — Nobel Prize-winning American novelist

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Sibling Name Ideas for William

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Frequently Asked Questions

What does the name William mean?

William is a boy name of Germanic origin meaning "Resolute protector." William derives from the Old Germanic name Willahelm, composed of "wil" (will, desire) and "helm" (helmet, protection). The name was brought to England by William the Conqueror after the Norman invasion of 1066, and it quickly became the most popular name among English royalty and commoners alike.

How do you pronounce William?

William is pronounced WIL-yum. Common variations include Wilhelm, Guillaume, Guillermo.

Is William a boy name?

Yes, William is traditionally a boy name. Popular nicknames include Will, Bill, Billy, Liam.

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