[3] Lord Mayo was succeeded by his eldest son John, 2nd Earl, who was a member of the Irish House of Commons.

He was a prominent Anglican clergyman and served as Bishop of Leighlin from 1772 to 1782 and as Archbishop of Tuam from 1782 to 1794.

He was succeeded by his eldest son, the fourth Earl who sat in the House of Lords as an Irish representative peer from 1816 to 1849.

On his death, the titles passed to his nephew, the fifth Earl who was also an Irish representative peer in the House of Lords from 1852 to 1867.

Known for most of his life under his courtesy title of Lord Naas, he was three times Chief Secretary for Ireland and served as Viceroy and Governor-General of India from 1869 to 1872, when he was assassinated on the Andaman Islands.

The tenth Earl was involved in British politics and unsuccessfully contested South Dorset in the 1964 general election as a Liberal.

Lord Mayo is a marble specialist like his father, whose children are Roman Catholics, reverting to pre-peerage family tradition.

He was formally known as Lord Naas between 1962 and 2006 and was educated at Portora Royal School, Enniskillen, and Queen's University, Belfast.