... When I checked Greencastle RC Graveyard inscriptions, I found this:
Erected by Richard McGreevy, in memory of his beloved wife Sarah McGreevy, who departed this life 4th August 1864, aged 37 years, also John McGreey [sic], who died 31st October 1909, and John McGreevy, who died 12th September 1963, also his wife Mary, who died 14th September 1963, RIP ...
also John McGreey [sic], who died 31st October 1909 presumably was the man in the following 1909 death record, reported as the 51 year old husband of Mary Ann McGreevy of 41 Little George's Street, which reads across to the folk in the following 1901 census return (don't know why John's age is so 'out'):
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1909/05446/4523779.pdf
http://www.census.nationalarchives.ie/pages/1901/Antrim/Dock_Ward/Little_Georges/936599/
Widower John McGreevey, son of Richard McGreevey a pilot, married Mary Ann (nee Quinn) Cowden in St. Patrick's on 27 October 1901:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1901/10324/5758466.pdf
Hi, I too have been doing research on the McGreevy clan as part of an outlying branch of my tree and I believe I can clear up some of the confusion surrounding this particular branch and the ages of some of the members. The 1901 census listed above contains the record for Mary Ann Cowden, John and Annie McGreevy. This is March 1901, a year after John McGreevy married Anne Rice and their first born child Henry McGreevy would be born at this address ( 41 Little Georges St.) on April 17 1901. John was the son of John McGreevy ( who died 1909 and is memorialised on the headstone in Greencastle cemetery ) and this is the John who married Mary Ann Cowden ( nee Quinn) the widow from the census later that year in October of 1901. The John from the census died in October 1917 during the war and is buried at Tower Hill Memorial in the UK.
There is definitely some repetition in this family tree with a lot of John's, James', Richards, Anne's being repeated throughout time and across family groups and it is easy to get them mixed up and I have done so myself a few times before getting them straightened out. Thanks for finding this 1901 census as I hadn't located it because of the misspelling of the surname but it slots in nicely now and corroborates other bits of information which I did have already.
So to reiterate, Mary A Cowden was the future stepmother to the John McGreevy in the census and John was married to the Annie McGreevy listed there ( Annie was not the daughter of another McGreevy as a later reply believed).
If anybody has any questions about any other McGreevy I would be happy to help out.
Garrett