The title of Earl of Aldborough was created in the Peerage of Ireland in 1777 and became extinct in 1875. The earls held the subsidiary titles of Baron of Baltinglass (1763), Viscount Aldborough (1776) and Viscount Amiens (1777), all in the Peerage of Ireland. The Peerage of Ireland is the term used for those peers created by British monarchs in their capacity as Lord or King of Ireland. ... 1777 was a common year starting on Wednesday (see link for calendar). ... 1875 was a common year starting on Friday (see link for calendar). ...