Viscount de Vesci

The title Baron Knapton was created in the Peerage of Ireland in 1750 for the first Viscount's father, John Vesey, 2nd Baronet, who had earlier represented Newtownards in the Irish House of Commons.

The baronetcy, of Abbeyleix in the Queen's County, was created in the Baronetage of Ireland on 28 September 1698 for the first Baron's father, Reverend Thomas Vesey, Bishop of Killaloe (1713–1714) and Bishop of Ossory (1714–1730).

The fourth Viscount served as Lord Lieutenant of Queen's County from 1883 to 1903.

[citation needed] In 1884, the fourth Viscount was created Baron de Vesci, of Abbey Leix in the Queen's County, in the Peerage of the United Kingdom, which gave him an automatic seat in the House of Lords.

The heir apparent is the present holder's second son, Hon.