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 "Luke Gardiner, 1st Viscount Mountjoy"): Luke Gardiner, 1st Viscount Mountjoy PC (Ire) (7 February 1745 – 5 June 1798) was an Irish landowner and politician.
Relevant evidence: No