Complex sentence: This title was in the Peerage of Great Britain and the sole subsidiary title of the dukedom was Earl of Connaught, in the Kingdom of Ireland, a title in the Peerage of Ireland.
Split into simpler sentences: This title was in the Peerage of Great Britain. The subsidiary title of the dukedom was Earl of Connaught, in the Kingdom of Ireland, a title in the Peerage of Ireland.