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 "Anglo-Irish people"): Anglo-Irish (Irish: "Angla-Éireannach" ) is a term which was more commonly used in the 19th and early 20th centuries to identify a social class and ethnic group in Ireland, whose members are mostly the descendants and successors of the English Protestant Ascendancy.
Relevant evidence: Yes