What does Deian mean?
Deian is a Welsh form of David, “beloved.”
What does Iestyn mean?
Iestyn is the Welsh form of Justin, “just” or “fair.”
Deian vs Iestyn
Which is more popular?
Deian and Iestyn are given to a similar number of US babies today.
| Deian | Iestyn | |
|---|---|---|
| Meaning | Beloved | Just, fair |
| Origin | Welsh | Welsh |
| Gender | Boy | Boy |
| Pronunciation | DAY-an | YES-tin |
| Syllables | 2 | 2 |
| First appeared | 2017 | 2010 |
| Peak year | 2023 (13) | 2010 (5) |
| In 2025 | 0 | 0 |
| Trend | Steady | Declining |
Popularity over time, 1880–2025
Deian
Iestyn
Source: US Social Security Administration.
Births by decade
| Decade | Deian | Iestyn |
|---|---|---|
| 2020s | 41 | 0 |
| 2010s | 10 | 5 |
Frequently asked questions
Is Deian or Iestyn more popular?
Deian and Iestyn are given to a similar number of US babies today.
What is the difference between Deian and Iestyn?
Deian means Beloved (Welsh origin), while Iestyn means Just, fair (Welsh origin).
Which name is older, Deian or Iestyn?
In US records, Deian first appears in 2017 and Iestyn in 2010, so Iestyn has the longer recorded history.