Richard,
John and wife Mary Doherty live in Keenagh during the Valuation. Children I have born to them are:
1858    21-Nov   Mary   John   McNulty   Mary   Doherty
1858    Jan   MARRIAGE   John   McNulty   Mary   Doherty
1860    March   Pat   John   McNulty   Mary   Doherty
1862   April   John   John   McNulty   Mary   Doherty
1864   May   Peter   John   McNulty   Mary   Doherty
1868    July   Mich   John   McNulty   Mary   Doherty
1870   Nov   Honor   John   McNulty   Mary   Doherty
1873   April   Cath   John   McNulty   Mary   Doherty
I have no Terrence or Francis , Peter, McNulty births that early. nor any John McNulty and Honora giving birth to any children.
There is a Peter McNulty and Bridget Nelson living on Rake st having children in the early 30s & 40s. Thery married in 1833. Also a Pat and wife Sara Nelson (most likely siblings marrying siblings.) also on Rake st who married in 1838.
Perhaps they lived along the fringe Crossmolina Parish, but went to another parish church such as Moygawnagh, Addergoole, Kilfian, ect.
Also tried to link the siblings of John, Mich and Mary but made no connections.
Infortunately the register is missing pages, and entire months and years so it is not complete.
Sorry I couldn't help,
Diane