Peter/Joanne
On the transcription site www.rootsireland.ie I looked up Ann Moore’s 1831 wedding in Ballylennon giving home area Glencush (has variant spellings).
https://www.townlands.ie/donegal/raphoe-north/clonleigh/clonleigh-north…
Glencash is in the Electoral Division of Clonleigh North, in Civil Parish of Clonleigh, in the Barony of Raphoe North, in the County of Donegal
From www.rootsireland.ie (this subscription site has a 24 hour option) located baptisms in Ballindrait Presbyterian – Records commence in 1819 and found birth records for 4 of the family born to James-Glencush
Margery -17/4/1820
Galbraith 31/12/1821
John -30/3/1824
Catherine 26/2/1826
Change of church Ballylennon Presbyterian:
Susana baptism 9/10/1829
Below are results from a look-up for marriages where father James, Glencush showing other family members:
All after civil registration for Protestant marriages which commenced in 1845:
www.irishgenealogy.ie (Free, copy records)
Peggy Jane (Mgt) married Robert Galbraith Dec 1845, father James, Glencush
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_re…
Susan's marriage 24/1/1856 to Robert Roulston
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_re…
Andrew marriage in 17/7/1857 Glencush father James,
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1851/09418/5412021.pdf
James Jnr marriage 3/1/1860 to Mgt Hood.
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1860/09591/5477930.pdf
Catherine's marriage to Wm Moody 7/5/1857
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_re…
On www.Rootireland.ie transcription, there is a record for Wm. Moore's death on 7/1/1836 age 23, area transcribed as Glencar, parish Ballylennon. Here is an account relating to early death:
https://freepages.rootsweb.com/~cotyroneireland/genealogy/surnames/moore2.html
Unfortunately, there are no early Donegal records for Andrew Armour. In Raymoghy for the Tithe's applotments(1826) and Griffiths valuation(1857) can see the usage of this first name but there are no church records available showing a relationship. For the locality, Anglican records commence in 1844 and Presbyterian in 1854. The site www.rootsireland.ie does not hold an Andrew in Donegal for the time frame.
https://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNameSearch&Submit.x=38&Submit.y=9&familyname=armour&wildcard=on&firstname=First+Name&countyname=DONEGAL&parishname=
http://titheapplotmentbooks.nationalarchives.ie/reels/tab//004625712/004625712_00017.pdf
Some churches commenced recording very late. Do you have any information on the first name of Andrew's father? Civil records differ by area and time frame but have seen Australian death records where parents’ names were listed. When reviewing for online presence on Ancestry.com found a record which has an Andrew in Victoria, Australia Assisted and Unassisted Passenger lists 1839-1923, ship the Cairngorm arrival in 1855, from Donegal, religion Presbyterian, age here is listed as 23, in old records often find several years plus or minus given. Not possible to prove Margery Moore (Armour) and Andrew's relationship but it is likely given that the surname Armour or variant Armor is uncommon, the link below shows frequency.
https://www.johngrenham.com/findasurname.php?surname=armour (An initial surname free then a 24-hour subscription possible)
Marion, IrelandXO Volunteer ☘