Really If no intermarrying occured then perhaps you can explain why people from nationalist background ended up with Anglo surnames like Gerry Adams and why people from the UlsterScots background have Irish Gaelic surnames Like Lenny Murphy  If you honestly believe that there was no intermarriage between the planters and natives then you are brain washed and deluded than the average Loyalist and thats saying something It did happen They intermixed for over two hundred years and when the Ulster Scots went to America they identified themselves as Irish  Respectable accademicahahhaha