What does Iestyn mean?
Iestyn is the Welsh form of Justin, “just” or “fair.”
What does Gwilym mean?
Gwilym is the Welsh form of William, “resolute protector.”
Iestyn vs Gwilym
Which is more popular?
Iestyn and Gwilym are given to a similar number of US babies today.
| Iestyn | Gwilym | |
|---|---|---|
| Meaning | Just, fair | Resolute protector |
| Origin | Welsh | Welsh |
| Gender | Boy | Boy |
| Pronunciation | YES-tin | GWIL-im |
| Syllables | 2 | 2 |
| First appeared | 2010 | 2005 |
| Peak year | 2010 (5) | 2005 (5) |
| In 2025 | 0 | 0 |
| Trend | Declining | Steady |
Popularity over time, 1880–2025
Iestyn
Gwilym
Source: US Social Security Administration.
Births by decade
| Decade | Iestyn | Gwilym |
|---|---|---|
| 2010s | 5 | 0 |
| 2000s | 0 | 5 |
Frequently asked questions
Is Iestyn or Gwilym more popular?
Iestyn and Gwilym are given to a similar number of US babies today.
What is the difference between Iestyn and Gwilym?
Iestyn means Just, fair (Welsh origin), while Gwilym means Resolute protector (Welsh origin).
Which name is older, Iestyn or Gwilym?
In US records, Iestyn first appears in 2010 and Gwilym in 2005, so Gwilym has the longer recorded history.