Richard Fitzwilliam, 6th Viscount Fitzwilliam
(see here),
bapt 24th July 1711,
mar Catherine Decker [dau of Sir Matthew Decker, Bart,
of Richmond, Surrey],
lived in his father-in-law's grand house in Richmond Green,
succ 1743,
as an absentee landlord,
started the development of Dublin's ultra-fashionable Georgian SE side,
extending from the Duke of Leinster's house
eastwards into the old Fitzwilliam lands around Baggotrath,
first laid out Merrion St 1758,
laid out Merrion Square 1762,
in later years he decided to live at Mount Merrion once more,
and made alterations there (think it was him who built the
main block),
[Freeman's Journal,
vol.12, no.4,
1 Sept 1774,
p.2 / p.14 d
and
p.3 / p.15 a]
praises the beauty of Mount Merrion,
died at Mount Merrion, 25th May 1776, age 64 yrs,
bur Donnybrook chapel,
(todo) see Exshaw's Magazine, 1776, p.384,
having had issue:
