Averil, some corrections:
Thomas Looney was buried 18 Mar 1826, not 1820. Also, I don't understand you adding ( Isabella 1779 and Thomas 1780) to the MI for two children of Thomas Looney Ballayilly buried 1782. Both of them, plus older sister Jane, lived a long time and married. The 2 children may have been un-baptized infants, perhaps twins born 1782.
Also, we now know that the pledge John Looney for Daniel Looney will 1825 likely is his brother, and is the one from the 1835 will. The John Looney (Margaret Hutchin) does not belong with them. Your message that I'm answering here was written before that was determined.