Question: What country do this social and ethnic group, to which William Stewart, 1st Viscount Mountjoy belongs and that are mostly the descendants and successors of the English Protestant Ascendancy, live?
Sentence (from "William Stewart, 1st Viscount Mountjoy"): William Stewart, 1st Viscount Mountjoy (1650 or 16533 August 1692), was an Anglo-Irish peer and soldier.
Relevant evidence: Yes