Meaning Derived from Hebrew, meaning 'Yahweh is merciful', a Welsh version of the name John. Origin of Ieuan Hebrew +-100%Zoom level changed to 1 Popular Middle Names Mateus Pronunciation 🔊 Listen Ieuan IEUan Similar Names Shane Shaun Ryan John Jonnie Gian Shaan Shayne Ievan Ian Sion Year by Year Popularity of Ieuan