The seat of the title-holders was, from the 1400s until 1953, Killeen Castle in County Meath, Ireland, and there was an ongoing close relationship with the related Plunkett family of Dunsany, and with the Viscounts Gormanston, with whom they intermarried.
When still Baron Killeen, his first wife[1] was Elizabeth, the second daughter of Henry FitzGerald, 12th Earl of Kildare, as properly recorded in the histories of the FitzGeralds of Kildare, based on their own family archives in Carton House and Kilkea Castle, and on no better authority than The 4th Duke of Leinster himself, writing at the time as Marquess of Kildare, who confirmed that Elizabeth married Luke Plunkett, 1st Earl of Fingall, in 1608.
[2][3] The eighth earl was created Baron Fingall in the Peerage of the United Kingdom on 20 June 1831.
The eleventh earl married Elizabeth Burke-Plunkett, who was noted both as an activist in numerous causes and as a society hostess.
All three titles all believed to have become extinct on the death of the twelfth earl in 1984,[4] and are not to be confused with the Prescriptive Barony or Lordship of Fingal originally granted in 1208 by King John of England.