Hi All,
Hope you don't mind me joining in on this one. I might have another piece to add to the jigsaw and hopefully this won't confuse things.
As you mentioned RC records I thought there might be a possibility that there might be burial records for an RC cemetery.
There is a separate thread in the Lanarkshire page on St Kentigern's. Records which are searchable at
https://www.familysearch.org/search/catalog/1321853 (hope the link works).
You can search the Daily Internment books roughly just after a date of death to find lair location and reference number and using the reference number you can then look at Grave Registers (lair books).
As you have Catherine's date of death in 1924, it looks to me as if she is buried in St Kentigern's. Looking at the lair books a Bridget (no surname recorded) was also buried there 30th March 1925. Going back to Daily Internments for 30th March 1925 there is a burial for a Bridget McIvor.
I haven't been able to match up an official death record to this burial though.
(It looks like Mary McIvor/Mooney was also buried in St Kentigern's.)
Hope this helps a bit.