Childrens names

[slohairt]

Would the pronunciation be different?

Yes! Seán is pronounced SHAWN, while Sean is pronounced SHAN. Interestingly, Seán, while the most accepted Irish version of John today, is really the Irish form of the Norman-French form of John: Jehan or Jean.

In Scottish Gaelic, Seán is often rendered Seathan. It's rarely seen, as the usual Gaelic form of John in Scotland is Iain.