Just found an image on Find My Past of an Extract from Census Return of 18 (The year is not stated).
Applicant is Arthur John MacGillicuddy (69 -70). Address is 23 Lichfield Grove, Church End, Finchley, London N
It appears to be dated 6.7.17 with a couple of later dates in July. So presumably 1917.
The parents are given as John and Alexandrina MacGillicuddy. Three names listed, Emily, Rosina, Achille. Dublin with street names Sackville Place and Southville Place.
The rest of it basically says that as there are no reg. of births in Ireland until 1864, the best evidence of age is by obtaining a baptismal certificate.
I haven't given every single detail, as this can be viewed on Find My Past.
Record is:- 1841-51
Ireland Census Search Forms 1841 & 1851