I am descended from John Mauck and Mary Knapp Mauck of Cheshire, OH. John and Mary's first son, David, born 1826, has descendants whose Y-DNA show that David was not John's son. John and Mary had another son, Charles, whose descendants show that Charles was fathered by John and that John was descended from Joseph Mauck. David's descendants show that David was fathered by a Shamblin, possibly John Shamblin of Mason County West Virginia. Somewhere there is documentation or a note that solves the mystery of how the Shamblin Y-DNA entered the Mauck line. Any clues or hints would be appreciated! Doug Mauck