Baron of Dunsany

[3] On the other hand, Debrett's listed the date of creation of the peerage as 1439,[4] confirmed by Letters Patent in 1461.

The third Baron was a founder member of the military order known as the Brotherhood of Saint George and supported the claims of the pretender Lambert Simnel to the English Crown.

He was restored to his estates after the Treaty of Limerick, but neglected the necessary measures needed to have himself recognised as the holder of the peerage, and, as such, was not summoned to further Parliaments.

The twelfth Baron conformed to the Church of Ireland to preserve the lands of both Dunsany and Killeen, but did not take the necessary steps to confirm his right to the title and to the seat in the Irish House of Lords it would bestow.

The seventeenth Baron, son of the sixteenth, sat as a Conservative Member of Parliament for Gloucestershire South and was an Irish Representative Peer from 1893 to 1899.

[5] The ancestral seat of this branch of the Plunkett family is Dunsany Castle in County Meath in Ireland.