This family is of Scottish descent.
ROBERT DOUGLAS (1655-1733), son of Robert Douglas, of County Down, by Elizabeth Henderson his wife, was a lieutenant in WILLIAM III's army at the battle of the Boyne.
He was thrice married, firstly, to Miss Elliot; secondly, to Miss Whitney; and thirdly, to Miss Usher.
Mr Douglas was succeeded by his son,
CHARLES DOUGLAS, High Sheriff of County Down in 1760, who wedded firstly, Grace, daughter of Richard Waring, of Waringstown, County Down, but had no issue.
He espoused secondly, in 1758, Theodosia, daughter of George St George, of Woodsgift, County Kilkenny, who was created a baronet in 1766, and by her had issue,
THOMAS;The eldest son,
THOMAS DOUGLAS, of Grace Hall, married, in 1786, Elizabeth, daughter of Mathew Forde, of Seaforde, County Down, and Coolgreaney, County Wexford, by Elizabeth his wife, sister of Thomas, 1st Viscount Northland, and had issue,
CHARLES MATHEW, his successor;The only son,
Elizabeth, m Rev S Blacker, of Elm Park, mother to S T BLACKER-DOUGLAS;
Theodosia, m Rev W B Forde, of Seaforde.
CHARLES MATHEW DOUGLAS JP DL (1793-1880), of Grace Hall, High Sheriff of County Down, 1836, dsp 1880, and was succeeded under the provisions of his will, proved in 1860, by his nephew, ST JOHN THOMAS BLACKER-DOUGLAS, of Grace Hall etc.
SAMUEL BLACKER, of Tandragee, County Armagh, barrister-at-law, third son of William Blacker, of Carrickblacker, County Armagh, by Theodosia his second wife, daughter of Sir Oliver St John, Knight, of Tandragee Castle, married, in 1734, Mary, daughter of Isaiah Corry, of Rock Corry, County Monaghan, and had by her a son,
THE REV ST JOHN BLACKER (1743-), rector of Moira, County Down, and prebendary of Inver, County Donegal, who married firstly, in 1767, Grace, daughter of Maxwell Close, of Elm Park, County Armagh, by whom he had issue,
SAMUEL (Rev), his heir;The Rev St John Blacker wedded secondly, Susan, daughter of Dr Messiter, of London, but had no further issue.
Maxwell, QC, of Dublin;
Mary; Catherine; Grace; Charlotte.
His eldest son,
THE REV SAMUEL BLACKER LL.D. (1771-1849), espoused Elizabeth, daughter of Thomas Douglas, of Grace Hall, County Down, and had issue,
ST JOHN THOMAS, his heir;The Rev Samuel Blacker was succeeded by his eldest son,
Thomas Samuel, of Castle Martin, Co Kildare, father of WILLIAM BLACKER;
Theodosia; Frances Elizabeth; Isabella.
ST JOHN THOMAS BLACKER-DOUGLAS JP DL (1822-1900), of Grace Hall, County Down, Elm Park, County Armagh, and Tullahinel, County Kerry, High Sheriff of County Armagh, 1861, who married, in 1855, Elizabeth, daughter of Colonel Crofton Moore Vandeleur MP, of Kilrush, County Clare, by Lady Grace Toler his wife, daughter of Hector John, 2nd Earl of Norbury.
He left issue,
MAXWELL VANDELEUR, his heir;Mr Blacker-Douglas assumed, by royal licence, in 1880, the additional surname and arms of DOUGLAS, on succeeding to the estate of his uncle, Charles Mathew Douglas.
St John Douglas Stewart;
Grace Elizabeth; Georgina Frances; Emily Theodosia.
His eldest son,
MAXWELL VANDELEUR BLACKER-DOUGLAS JP DL (1859-1929), of Grace Hall, and Elm Park,
High Sheriff of County Kerry, 1905, and of County Dublin, 1909, lieutenant, 4th Battalion, Royal Inniskilling Fusiliers,married, in 1891, Alice, only child of Robert MacGeough, of Silverbridge, County Armagh, and had issue,
ROBERT ST JOHN (1892-1915);
Charles Maxwell, b 1900;
Alice Florence, b 1895.
GRACE HALL, Dollingstown, County Armagh, is a three-storey, double gable-ended 18th century house in the Regency style.
The Douglases owned most of their land on the County Down side of the border.
It has a front comprising two full-length curved bows, with one bay in between.
There are Wyatt windows; a porch was added at a later stage.
Other former seat ~ Elm Park, County Armagh.
Former residence ~ 2 Bellevue Park, Killiney, County Dublin.