Hi dermo,
I'm not too far away so, as always, I'm planning my next visit.
I will add the Memorials book to my look-ups list, but I'd also like to visit, as the best find so far at Glasnevin was a memorial on a grave that I was initially told was not a family grave and later told that in any case, because of it's location there would be no surviving memorial. It connected up a family to the preceding generation.
Checking the list, there are 15 burials in the Goldenbridge plot, so it is possible that the earliest ones with a couple of different names are also related, but also possible that I have burials in AA 10 and aa 10 listed together, for instance. I have already sent a message to Glasnevin asking them to check the plot number(s) for me, as the list was only provided, all in upper-case. It's so annoying that they will not treat plots with more than 10 burials as a family grave even when several of them are known to be related. Although they did send the list after I queried it, I only have the few images that I purchased separately so know that the images I have show both letters upper-case but I don't have images for the ones that I don't recognise, to check how they were entered in the register.
On the whole, I have not been so lucky in finding memorials at Glasnevin, in spite of a, now very substantial, list of family graves. I also have at least one grave with several family members at Mount Jerome, but the day that I went there was bitterly cold and the cemetery was quite busy with funerals so, after having waited to get some information, I decided not to try a search but leave it to come back to.