Yes, although most "Scots Irish" identify as just American these days.I've heard the term "Scots Irish" on American films and TV shows. Is that one of the groups you mention.
They predate the Irish Catholic migration from Ireland by around 100 years or more.
They were mostly Presbyterians from what was then Ulster.
Although it has to be admitted that they too,faced discrimination and hostility from Quakers and Anglicans in America.
They were sent to the frontier to create a buffer zone.
