boy's name
Iestyn
YES-tin (Welsh)
- Origin Welsh, Latin
- Gender Boy
- Syllables 2
- Letters 6
- Popularity Uncommon
- Births on record 1,547
Iestyn is a Welsh boy's name meaning "just" or "fair." It's the Welsh form of Justin, from the Latin Iustinus, and it was borne by a sixth-century saint in Wales. The name is pronounced YES-tin, and it remains closely tied to Wales.
- Iestyn is a name of Welsh, Latin origin.
- Peaked in England and Wales in 2004, when 138 babies were given the name.
- It has been falling over the past decade in England and Wales.
- Today about 1 in 52,695 babies in England and Wales is given this name.
- First appears in birth records in 1996.
- 2 syllables, with the stress on syllable 1.
Iestyn Over Time
Births per decade in England and Wales, 1990s to 2020s. The striped bar is the 2020s, which so far covers 2020 to 2025.
Show the numbers
| Decade | Births |
|---|---|
| 1990s | 122 |
| 2000s | 850 |
| 2010s | 484 |
| 2020s (to 2025) | 86 |
What Iestyn Means
Iestyn means just, righteous or fair, from Latin iustus. The name came to Wales through Roman and Christian contact, and its sound has become thoroughly Welsh in the centuries since.
Where Iestyn Comes From
Latin iustus, just, gave the Roman name Iustinus, which spread with Christianity, helped by the martyr Justin of Rome. Welsh took it early, adapting the sounds to its own speech so that Iustinus became Iestyn. A Welsh saint of that name lived in the sixth century, and the name stayed in use through the medieval period, carried by Iestyn ap Gwrgant, an eleventh-century ruler of Morgannwg in south Wales. Parents in Wales still use it, which keeps a Roman name alive in a thoroughly Welsh form. Prokerala's short gloss "moral" reflects the same idea of righteousness.
Iestyn in Use
The name's strongest association is its Welsh identity, and it's rarely found outside Wales and Welsh families in England. English speakers often misread the opening letter, so the spelling needs a word of explanation.
How Popular Is Iestyn?
In 2025, Iestyn was given to 10 babies in England and Wales. It is used consistently but remains uncommon.
Where Iestyn Is Used
Figures for England and Wales leave out any name given to fewer than three babies in a year, so a gap means the name fell below that floor rather than went unused. Data & sources.
Names That Peaked Alongside Iestyn
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents Who Like Iestyn Also Like
Names whose popularity has risen and fallen in step with Iestyn over the last century — the same taste, a different name.
How to Say Iestyn
- Welsh YES-tin
Iestyn in Other Languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
- Dutch
- Justin
Sibling Names for Iestyn
Names from the same era that do not rhyme or share an initial with Iestyn — the two things that make a sibling set grate.
Common Questions About Iestyn
What does the name Iestyn mean?
Just or fair, from the Latin Iustinus.
How do you pronounce Iestyn?
YES-tin. The I works like an English Y.
Is Iestyn the Welsh version of Justin?
Yes. Both come from the Latin name Iustinus.
How popular is the name Iestyn?
In 2025, Iestyn was given to 10 babies in England and Wales. It is used consistently but remains uncommon.
Is Iestyn a girl's or a boy's name?
Iestyn is given almost entirely to boys in birth records.
How many syllables are in Iestyn?
Iestyn has 2 syllables.
When was Iestyn most popular?
Iestyn peaked in 2004, when 138 babies were given the name. It has been falling over the past decade.
Is Iestyn a good name?
That is not something records can settle, but they can tell you what you would be choosing. Iestyn currently ranks #2,428 in England and Wales. It has been falling over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.