Given name
Uilliam
“the detewmined protector”
Uilliam is a variant of Uilleam. In Scottish use, Uilleam carries the interpretation “the detewmined protector.”
Meaning & origin
What it means
Uilliam is a variant of Uilleam. In Scottish use, Uilleam carries the interpretation “the detewmined protector.”
Explained through its name family
Where it comes from
Uilliam connects to the William name family through Uilleam. William is an English form of a Germanic name brought to England by the Normans.
Explained through its name family
How it developed
In Irish usage, Uilliam developed from William. Uilliam connects to the William name family through Uilleam. The shared background comes through William: William joins the Germanic elements wil and helm. The second element began with the concrete image of a helmet and also carried the broader idea of protection.
Combines direct and name-family evidence
The story
Published U.S. birth records include this spelling as early as 2013. This is the earliest published observation available here, rather than a date for the name’s origin. Uilliam connects to the William name family through Uilleam. The history of William gives this family its wider story. William spread widely in England after the Norman Conquest, among people beyond the Norman ruling class. William remained prominent through the Middle Ages and became a royal name in England, Germany, and the Netherlands.
Combines direct and name-family evidence
Uilliam through the years
- Babies since 1880
- 52
- 52 boys · 0 girls
- Most popular year
- 2018
- 11 babies
- 2025
- 0
- Outside the ranked list
- 2021–25 vs 2016–20
- —
- Too few births to compare
By the numbers
The most recent published U.S. birth count for boys is 5 in 2024. Later missing counts do not mean the name went unused. Its largest published annual count for boys was 11 in 2018.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Uilliam’s family of names
In Irish usage, Uilliam has a diminutive in Liam. In Irish usage, Uilliam developed from the Middle English form William. In Irish usage, Uilliam has a conventional equivalent in the Spanish form Guillermo.
Inner ring: nicknames and forms · outer: across languages.
Around the world
Uilliam has relatives in 8 languages.
8 related names in 8 languages. Point at a dot, or tab to the map and use the arrow keys.
Nicknames & forms 2
Diminutives, pet forms, short forms and variants used alongside the name.
Across languages 7
Equivalents and cognates in other languages, plus older forms it grew from.
Similar names
If you love Uilliam, these share its style, era, origin or sound, from outside its own family.