A friend informs me that The Sydney Morning Herald of 14 May 2012 carries a death notice for
'Mark' de la Poer Beresford, who has died aged 88 (no death date
given); he leaves a [second] wife, Gwen, children Roslyn and Julie and
grandchildren and great grandchildren.
Mr de La
Poer Beresford was the only son of William Coventry de la Poer
Beresford (1887-1938), 2ndson of Henry Tristram de la Poer Beresford
(1841-1930), 2nd son of the Revd George Hamilton Beresford (1801-1869),
3rd son of the Revd and Hon George Beresford (1776-1842), 2nd son of
William Beresford, 1st Baron Decies. He was therefore in remainder both
to the Irish barony of Decies, and to the subsidiary titles of the
Waterford family, the 1st Baron having been a younger son of the 1st
Earl of Tyrone, viz the Irish earldom
and viscountcy of Tyrone, and the baronies of Beresford and la Poer, as
well as the family's Irish baronetcy of 1665.
RL