UNTRACEABLE did it!
With a name such as Ernest he had to be out there!
This is the 1911 census return for Ernest de Sylly Hamy Browne
http://www.census.nationalarchives.ie/reels/nai002673527/as Ernest de S Hamilton Browne (de S on original transcribed as de L)
quote from
The county families of the United Kingdom; or,
Royal manual of the titled and untitled aristocracy of England, Wales, Scotland, and Ireland (Volume ed.59, yr.1919). (page 50)
BROWNE, Ernest de Silly Hamilton, Esq., of Comber House, Co. Londonderry.
Seventh son of Major George Browne, of Comber House, who rf. 1887, by Susan Mary, who d. 1880, dau. of the late Thomas" Hilton, Esq., of The Polygon, Manchester; b. 1855;
m. 1885 Ellen Augusta, only dau. of Sir Alexander Ramsay, 3rd Bart., of Balmain.
Mr. Browne, who was educated at Cheltenham Coll., is a Magistrate for King's Co. — Comber House, Clandy, Co. Londonderry.
Residence: Brookfield, Tullamore, King's Co. ; Kildare Street Club, Dublin.
As he states he was born in England you may need to look there for his date of birth or in other books on aristocratic families.