Excellent research. Out of all the children of Moses Parker, would there not be at least two who would take the Family Finder dna test and see what families are connected through their matches? This was the situation with Henry Parker's sons who are all matches in Group #1 of the Parker Surname Project. We have at least four now who match from separate sons.
It is hopeful that at least one of Moses's descendants would take this test.
I am interested in this testing of Moses's descendants because my ggggrandfather Henry Parker lived in the neighborhood of Marlboro co. S.C. also.