Welsh form of Justin, derived from Latin 'Justinus' meaning 'just,' 'righteous,' or 'upright.'
Iestyn is the Welsh form of Justin, from Latin Justinus, meaning just, righteous, or upright. That gives the name a moral and ethical center, placing it among the many names built on the virtue of justice.
The Welsh form feels strong and distinctly regional, with a crisp, historical sound. Iestyn has the sort of structure that makes it unmistakably Welsh while still connecting to a broader European tradition. It sounds serious, rooted, and quietly authoritative, with meaning that reinforces its upright character.