Complex sentence: The third Baronet was created Viscount Rosse in Peerage of Ireland in 1681, and the second Viscount was created Earl of Rosse in the Peerage of Ireland in 1718; these titles of the first creation became extinct on the death of the second Earl in 1764.
Split into simpler sentences: The third Baronet was created Viscount Rosse in Peerage of Ireland in 1681, and the second Viscount was created Earl of Rosse in the Peerage of Ireland in 1718. These titles became extinct on the death of the second Earl in 1764.