Hi Ann, Your question is, "Kesterson/Voils - Can anyone help with a connection? DNA shows William Voils a Kesterson by birh." Correct?
What DNA test was used? YDNA? Did someone living do the DNA test? How did you get William's DNA, since he was born and died in the 1800s? How do you know he is the disconnect?
My experience is that in colonial and early America, orphans from one family were often taken in and raised as a member of another family. Meaning William could have been born a Kesterson and was adopted and raised as a Voil. But that is only one possibility.