(hi Meles, taking a break form Biddlecombes!)
orinoco -
Start a thread on "Irish - General", if yuo are sure yuo need to be looking in Ireland. I agree with Meles, Ireland will take specialist advise, many of us dont know where to begin!
but where did the info that he was born in Ireland come from?
if it is just family hearsay, I would be inclined to work backwards from what you do know, until something more definite comes up to confirm an Irish birth.