This family, which has been ennobled in two branches, assumed the name from the Seigneurie of LA TRANCHE, in Poitou, of which they were formerly possessed.
The first of the family in England was
FREDERICK DE LA TRANCHE, or TRENCHE, a protestant nobleman who fled from France after the massacre of St Barthomolew, and took up his abode in Northumberland ca 1575.
He married, in 1576, Margaret, daughter of Thomas Sutton, and had issue,
THOMAS, his heir;The eldest son,
James, m Margaret, daughter of Hugh, Viscount Montgomery;
THOMAS, married, in 1610, Catherine, daughter of Richard Brooke, of Pontefract, Yorkshire, and had issue,
FREDERICK, of whom we treat;The elder son,
John (Very Rev), Dean of Raphoe; ancestor of BARON ASHTOWN.
FREDERICK RICHARD TRENCH (1681-1752), succeeded at Garbally; from whom descended the 1st Earl's grandfather, Richard Trench, who espoused Elizabeth, second daughter of John Eyre, of Eyre Court, County Galway; and was grandfather of
RICHARD TRENCH (1710-68), who was returned to parliament for County Galway, which county his father had represented for thirty-seven years.
He wedded, in 1732, Frances, only daughter and heir of David Power, descended from the Barons de la Poer, and, in the female line, from the Lords Muskerry, afterwards Earls of Clancarty, by the marriage of John Power with Elena, daughter of Cormac, Lord Muskerry.
Through this marriage, Mr Trench obtained the united fortunes of the families of POWER and KEATING.
He died in 1768, having had issue,
FREDERICK and DAVID, both died in infancy;
WILLIAM POWER KEATING, of whom hereafter;
John, a major in the army;
Eyre, a Lt-Gen in the army;
Anne, m C Cobbe, of Newbridge.
WILLIAM POWER KEATING TRENCH (1741-1805), MP for County Galway, 1768-97, was elevated to the peerage, in 1797, by the title of Baron Kilconnel, of Garbally, County Galway, and Viscount Dunlo, of Dunlo and Ballinasloe, in the counties of Galway and Roscommon.
His lordship was further advanced to the dignity of an earldom, in 1803, as EARL OF CLANCARTY (2nd creation), in consequence of of his descent from Elena MacCarty, wife of John Power, daughter of Cormac Oge MacCarty, Viscount Muskerry, and sister of Donough MacCarty, Earl of Clancarty in the reign of CHARLES II.
He wedded, in 1762, Anne, eldest daughter of the Rt Hon Charles Gardiner, and sister of Luke, 1st Lord Mountjoy, and had issue,
RICHARD, his successor;His lordship was succeeded by his eldest son,
Power (Most Rev), Lord Archbishop of Tuam;
Charles (Ven), Archdeacon of Ardagh;
Robert le Poer (Sir), KCB;
Florinda; Anne; Elizabeth; Harriet; Frances; Louisa; Emily.
RICHARD LE POER, 2nd Earl (1767-1837), GCB, PC, who was created a peer of the United Kingdom, as BARON TRENCH, 1815, and raised to an English viscountcy, as VISCOUNT CLANCARTY, in 1824.
In 1813, his lordship was appointed ambassador to The Hague, and was created by the King of the Netherlands, in 1818, Marquess of Heusden, having obtained permission of his own Sovereign to accept the said honour.
Lord Clancarty wedded, in 1796, Henrietta Margaret, second daughter of the Rt Hon John Staples, and had issue,
WILLIAM THOMAS, his successor;His lordship was succeeded by his eldest son,
Louisa Augusta Anne; Harriette Margaret; Emily Florinda; Lucy.
WILLIAM THOMAS, 3rd Earl.
- William Thomas Le Poer Trench, 3rd Earl (1803–72);
- Richard Somerset Le Poer Trench, 4th Earl (1834–91);
- William Frederick Le Poer Trench, 5th Earl (1868–1929);
GARBALLY COURT, Ballinasloe, County Galway, is a large, austere, two-storey mansion, built in 1819 to replace an earlier house burnt in 1798.
It is square, built round what was originally a central courtyard.
The eleven-bay entrance front has a single-storey Doric porte-cochere.
There is an adjoining front, also of eleven bays, with pediments over the ground-floor windows.
The rear elevation has a single-storey curved bow.
The hall boasts Ionic pilasters and niches, with an arch leading to a grand picture gallery, built in the central courtyard about 1855.
The 5th Earl of Clancarty sold Garbally Court in 1907, following the decimation of his estate caused by the Land Acts.
Garbally College, a Roman Catholic boys' school, purchased Garbally Court in 1922.
First published in December, 2012. Clancarty arms courtesy of European Heraldry.