Death of Joseph P MORRIS at 74 Harold's Cross Road in December 1940 
LINKI believe that Angela O'CARROLL the informant was his grand-daughter 
LINKand death notice attached
probate to Margaret MORRIS of same address 
LINKAgnes MORRIS died on Nov 29 1936 - address given as 74 HX Rd 
LINK1901 living at house 11 in Wolseley Street (Merchants Quay, Dublin) 
LINK1911 living at house 130 in Harold's Cross Road (Rathmines & Rathgar West, Dublin) 
LINK130 was the numbering given by the enumerator as far as I am aware 
and this may be the same house as 74 later in the 1930s/1940s
Family listed on census are:
Mary - married Myles CARROLL Nov 14 1910 
LINK; died Jun 14 1947
      Mary CARROLL (nee) MORRIS has a death notice in 1947 that states she is late of 74 HX Rd 
LINKFrancis - married Bride BUTLER Aug 13 1917 
LINK; died Nov 12 1921 
LINKRaphael - died June 08 1909 aged 18 
LINKMargaret - presumed alive at 1941 at time of probate
Charles (twin) b Oct 21 1894 - presumed alive at 1940 given wording of death notice;
      married Ellen GRIFFIN nee BYRNE Mar 21 1941 
LINK      possibly died 1953 
LINK requires further verification
Not listed as she was deceased
Angela (twin) b Oct 21 1894 - 
LINK to birth - died Dec 06 1894 
LINKJoseph MORRIS first married Maria Ellen ROURKE on Jun 30 1885 
LINKEllen MORRIS died Feb 20 1897 
LINKJoseph MORRIS then married Agnes DUNNE on May 02 1898 
LINKIn 1961 Miss Margaret MORRIS of 74 HX Rd won a consolation prize in the Dublin Gas Company's Fortnightly competition! reported on the Dublin Evening Mail 10 August 1961
In answer to the original question as to who was in #74
The MORRIS family were definitely in #74 from 1936 towards the end of 1961 and possibly as early as 1911 if the enumerated house #130 was confirmed to be the same building
The family had a connection to Harold's Cross from the 1880s according to the addresses on all the records.
By May 09 1964 a B Fitzmaurice is reported with the address in another newspaper report of another competition, the Alpine Draw's results
Hope that this helps a little more