Ellinor d/o John + Ellinor was bp 1756 only dau in a fam of sons - her mother d 1778 (chk will) so likely she had to housekeep for father who prob died 1796 (again chk wills) - this could explain late marriage + having the only one child.

The other Ellinor d/o Pat + Ann was bp 1772 thus I would have expected a larger family unless one of parents died early

Wills of putative parents are your best guide