Name Awesome

Gwilym

Boys' name

Will + helmet

Gwilym has been given to 5 babies in the U.S. since 2005. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2005, with 5 recorded.

Babies named Gwilym, 2005

1 in 769,000

Gwilym over time, 1880–2025

Boys
024618801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Gwilym: meaning, origin, and history

Will + helmet

Deeper origin not confirmed in the cited records

What Gwilym means

Gwilym means “will + helmet”, associated with wiljô and helmaz.

Origin, language, and formation

Gwilym is used in Welsh.

Gwilym comes through Anglo-Norman Willame, Old High German Willahelm and Proto-Germanic *Wiljahelmaz.

Related names and everyday forms

Related names include William.

Pronunciation and spelling

In Welsh, Gwilym is pronounced /ˈɡwɪlɨ̞m/.

American usage and historical context

In the United States, 5 boys were recorded with the name Gwilym between 2005 and 2005. Its highest annual count was 5 in 2005; its best national rank was #12,056 in 2005.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Gwilym?

Gwilym had fewer than 5 recorded uses in 2025, so these figures use 2005, the last year it was published.

Among all babies, 2005
1 in 769,000
5 of 3,844,258 births
Among boys only
1 in 399,000
<0.01% of boys
Rank, 2005
Unranked
Fewer than 5 uses
Coin-flip room size
532,928 kids
Even odds of a second one

Where Gwilym sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2005 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 532,928 children born in 2005 and it's an even bet that one of them is another Gwilym. In a class of 30 the chance is Under 1%.

When Gwilyms were born

Half of everyone ever recorded as Gwilym was born before 2005 — so the typical Gwilym is around 20 today.

Median birth year
2005
About 20 years old
Biggest decade
2000s
100.0% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
5
People you could plausibly meet
Choose a decade

2000s — 100.0% of all recorded uses (5).

Is Gwilym rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
—
Not ranked then
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
0%
Peak was 2005 (5)
Years since peak
20
Years
Year-to-year steadiness
Not enough data
Too few years
Best rank ever
#12,056
2005

Gwilym around the world

Where Gwilym ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2025
    #1,359
    in 2025
  • South Australia
    2003–2003
    #588
    in 2003

Popularity data from Office for National Statistics and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. CBS SA data under CC BY 4.0.

Gwilym by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#12,056
2005
Peak year
2005
5 that year
First recorded
2005
Last recorded
2005
All-time count
5
Count in 2025
Under 5

Names similar to Gwilym

Matched on shared beginnings and endings, similar length, and comparable popularity.

GwizaGwinnHarlymGwin

Sibling names for Gwilym

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Gwilym

Top names of 2005, Gwilym's peak yearThe 2000s in fullOther names that peaked in 2005Boys' names starting with GUncommon Welsh Boy Names