What does young James mean in Irish?

There isn't a direct translation of "young James" in Irish that's a single, established phrase like you might find for "young John" (Seán Óg). You'd express it by using words that mean "young" and "James" together.

The most common ways to say "young James" in Irish would be:

* Séamus Óg: This is probably the most natural-sounding option. "Séamus" is a common Irish form of James, and "Óg" means "young."

* An óg-Séamus: This literally means "the young James," but might sound slightly more formal or literary.

Therefore, Séamus Óg is the best and most commonly used translation.