In the 1779 Taxes for York County James and Robert are in Fawn township,widow Gibson and William are in Mt Joy Township, John is in Hopewell and there is a widow Gibson and another John single in Hamilton Bann Township. Assuming that the Gibsons didn't move out of York until after 1780 for the sake of argument one of those listed above is the father/mother of James Gibson b. 1776. Have you eliminated any of the above already? Where your Gibsons Quakers or Presbyterians?