I took a couple of screenshots of film today (not great as faint on film) + can let you have them - but no explanation of the grandchildren - I suspect he was pledge and exor to one of his children ? prev husb to Cath but doesn't fit with my reading
d 1 Aug 1674;ch Ann + Jony admrs - at age + sworn; admrs state that there are not enough goods to pay the gch's goods now in his hands + request Genl Sumner to handle - decree states that Tho Skillicorn + Cathrine Skillicorn to pay sd ch before any other debts and acquit pledges Wm Cluage + Philip Skillicorn;25 Nov 1674: Tho Skillicorn has goods of child ua (pledge Christor Quay Ramsey) - inv from Genl Sumnr £19 0s 3d + overplus to other creditors;15 Mar 1674: Philip Cown + Tho Cown [word not clear?] claim 11s;noted that the crop was to be given in contract bargain before Wm Cown contracted the above debt

The early Margt Cown not clear if related but names same
d 1 May 1674;sis Ann + Jony Cown jt admxs;pledge Phillip Kissag