Hi Val
Sounds good. I realised when looking back that I hadn't mentioned Magherabeg in my post, but that is indeed where this Neeson family were from. It is a very small townland in the district electoral division of Sharvogues, a rural area. If you have a look at the following map, you will see Magherabeg with Sharvogues Burn nearby:
Map of MagherabegLooking again at the various dates, my earlier note that her grandparents may have been Robert and Margaret (nee Lyttle) Neeson is probably wrong (they married in 1858 but I think their son, John, was not born until 1869, albeit I have no cross reference on that birth), but I believe there was a family connection as they too came from Magherabeg (indeed were both still living there at 1901 aged 72 and 73) and one of Catherine's younger siblings carried the middle name Lyttle. Another couple in the area of the right age to be her grandparents were a James and Rose Ann (nee Irvine/Irwin/Erwin) Neeson.
Whilst Magherabeg is just cut off the following map (at the bottom), it does show you how close it, Sharvogues, Crevilly-valley and Kildrum were to each other:
Kildrum etc If you want me to scan and send the 1901 Census page for Catherine, PM me with your email address.