I looked through my 'todo' pile found 1830 John K. whom I think is yours
petn cy creditors Thomas Woods + Wm Clark(Kk Michael) that died some time ago; Thomas Corkan(sumner) appt admr but widow may produce will
I didn't see any will nor change to the decree but enjoy your search tho Episcopal wills as that court will deal with it
I think this is the John bur 3 Oct 1829 - no info tho in burial reg

I think these Kennaghs had land in Foxdale - an 8s 6d (tho amount seems to vary by a penny or so between books) in Armicarningham with Foxdale - I think they were actually near Ballanass

in 1780 book there is a change from John K + son John to John K + grandson John
and in 1795 book noted changes in apr 1805, apr 1816 + oct 1854 - try lib vas or deeds

however never found any further trace of Emmy