I like Owain. (actually prefer the way it is said compared to how owen sounds) Though Eoin is okay. Would you spell it with a fada on the i ? if yes I like the look of it better yet I can't stand Eóghan
Will DC have an obvious irish or welsh surname (eg an O' or Mc or something like Gruffydd, Rhydderch, Bevan) If so maybe have the oposite owen. So with welsh surname have Eoin or Eoghan With Irish one have Owain.