Gwilym
A boys’ name of Welsh origin, meaning resolute protector; form of William in Welsh.
Babies a year
20
England and Wales, 2025
Rarity
Rare
among names in use
US popularity
—
outside the top 1000
UK popularity
#1359
20 babies
Gwilym by the numbers
In 2025, 20 babies in England and Wales were named Gwilym.
Its American peak was 5 babies in 2005, making it a 2000s name.
Other names that come from William
Like Gwilym, each of these traces back to William: a form of it, a name built from it, or a son or daughter of it. Not always the same sex.
- Wilsonson of William, resolute protector402 in the US (2017)
- Billieresolute protector; a form of William331 in England and Wales (2025)
- Guillermoresolute protector; a form of William287 in the US (2017)
- Willieresolute protector; a form of William286 in the US (2017)
- Willresolute protector; a form of William237 in the US (2017)
- Willemresolute protector; a form of William55 in the US (2017)
- Willisresolute protector; a form of William47 in the US (2017)
- Billresolute protector; a form of William9 in England and Wales (2025)
Other names that mean a protector
Like Gwilym, each of these has a protector in its meaning. Different names, different histories, the same idea.
- Liamresolute protector; short form of William18,764 in the US (2017)
- Williamresolute protector14,922 in the US (2017)
- Alexanderdefender of the people12,488 in the US (2017)
- Parkerkeeper of the park; park ranger5,833 in the US (2017)
- Alexisdefender, helper2,847 in the US (2017)
- Alexdefender, helper; short form of Alexander or Alexis2,766 in the US (2017)
Other names that mean strength
Like Gwilym, each of these has strength in its meaning. Different names, different histories, the same idea.
- Liamresolute protector; short form of William18,764 in the US (2017)
- Williamresolute protector14,922 in the US (2017)
- Ethanstrong, enduring12,398 in the US (2017)
- GabrielGod is my strength9,110 in the US (2017)
- Aaronmountain of strength; exalted7,185 in the US (2017)
- Aubreyelf ruler; noble strength6,029 in the US (2017)
Names about as common as Gwilym
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