So early as the 11th century, we find
JOHN PLUNKETT, of Beaulieu, County Meath, the constant residence of the elder branch of his descendants.
The successor at Beaulieu, at the beginning of the 13th century,
JOHN PLUNKETT, living at the time of HENRY III, had two sons,
John, ancestor of the Lords Louth;RICHARD PLUNKETT, of Rathregan, County Meath, who, with his son and heir, RICHARD PLUNKETT, by royal writs of parliamentary summons, was summoned to, and sat in, the parliaments and council of 1374.
RICHARD, of whom hereafter.
The younger Richard Plunkett was father of
SIR CHRISTOPHER PLUNKETT, knight.
This gentleman, as a recompense for the services he had rendered in the wars of Ireland, and as an indemnity for the expenses he had incurred, had a grant of a sum of money from HENRY VI, in 1426; before which time he was sheriff of Meath; and in 1432, was deputy to Sir Thomas Stanley, knight, Lord Lieutenant of Ireland.About 1426, this gentleman was created Baron Killeen.
Dying in 1445, his lordship was succeeded by his eldest son,
CHRISTOPHER, 2nd Baron.
- Luke Plunkett, 1st Earl (1589–1637)
- Christopher Plunkett, 2nd Earl (d. 1649)
- Luke Plunkett, 3rd Earl (1639–84)
- Peter Plunkett, 4th Earl (1678–1718)
- Justin Plunkett, 5th Earl (d. 1734)
- Robert Plunkett, 6th Earl (d. 1738)
- Arthur James Plunkett, 7th Earl (1731–93)
- Arthur James Plunkett, 8th Earl (1759–1836)
- Arthur James Plunkett, 9th Earl (1791–1869)
- Arthur James Plunkett, 10th Earl (1819–81)
- Arthur James Francis Plunkett, 11th Earl (1859–1929)
- Oliver James Horace Plunkett, 12th Earl (1896–1984).
Fingall arms courtesy of European Heraldry.