The following is a list of congregations known by names other than the official names. If you know of any others please contact the Librarian.
- Alfred Street, Belfast : Fitzroy
- Aghalow : Aghaloo
- Anaghlone : Annaclone
- Anahilt : Annahilt
- Ardstraw (2nd) : Drumlegagh
- Armaghbrague : Armaghbreague
- Badoney : Bodoney
- Ballyclug : Brigh
- Ballyhalbert : Glastry
- Ballynahatty (2nd) : Creevan
- Ballytrain : Corlea
- Belview : Donore
- Benraw : Leitrim
- Braddox : Clontibret (2nd)
- Bushvale: 2nd Kilraughts
- Carntall : Clogher, Co. Tyrone
- Carrockmaclin : Corvalley
- Clondevadock : Fannet
- Cloveneden : Loughgall
- Clownis : Stonebridge
- Cornasass : Kilmount
- Croghan : Killeshandra
- Dartry : Drum (1st)
- Derg : Castlederg
- Derryfubble : Eglish
- Derrykeighan : Dervock
- Dervock: Carncullagh
- Donagh : Carndonagh
- Drumgavlin : Magherahamlet
- Emyvale : Carrigans
- Fivemiletown : Cavanaleck
- Freeduff : Creggan
- Goulan : Fintona
- Grallagh : Brookvale
- Keppie : Cappagh and Mountjoy
- Kilmakee : Belfast : Seymour Hill
- Kinnaird : Lislooney
- Legnacreeve : Clontibret (1st)
- Linenhall Street : Crescent
- Longfield : Drumquin
- Lowtherstown : Irvinestown
- Manorcunningham : Ray (1st and 2nd)
- Millrow : Antrim
- Monytaghs : Bellville
- Muff : Knowhead
- Mullaghferry : Killala
- Mullans : Donegal (2nd)
- Narrow-water : Warrenpoint
- Newtownparry : Seskinore
- Queenstown : Cobh
- Raneeny : Donegal (1st)
- Scarnageeragh : Glennan or Emyvale
- Shercock : Glassleck
- Sydenham : Belfast : Strand
- Taboyne : Monreagh
- Tannaghnive : Saintfield (1st)
- Temple : Keady (1st)