  == Ulster-Scots? ==  This doesn't make sense at all, while the majority of Scotch-Irish settlers in Ireland lived in the Ulster province, not all of them did. For example in my ancestry there many of them came from County Longford, which is not in the Ulster province. It's not accurate to not mention those who didn't live in Ulster and those who lived in parts of Ulster no longer part of Northern Ireland, such as County Monaghan.   It's also inaccurate to portray them merely as Scottish immigrants to Ireland and seperate from today's Catholic Irish, when infact there was a lot of mixing between the native Irish, English settlers, Scottish settlers and even Welsh settlers to Ireland.. so that even most Irish catholics have Scottish/English heritage originating in this era, and that many of the Protestant Immigrants to America in the 1700s and early 1800s were thoroughly mixed with the native Irish and considered themselves to be Irish. Genetically speaking there's little to differentiate between those of Scotch-Irish stock and those of Catholic Irish heritage, because they generally mixed together over the years.