I have been following John WILKINSON who resided in Springhill Twp., Fayette Co. PA as early as 1780. He seems to have had sons: Thomas, John, and William. Thomas dies c1805 and leaves a widow, Sarah LONG, living in Greene and Dunkard Twp. of Greene Co. PA. John remains in Springhill Twp., Fayette Co. PA till 1820 when he disappears. William appears in Dunkard Twp., Greene Co. PA by 1820 and seems to have been father of Thomas who dies in Dunkard Twp. after a brief marriage to Sarah HUNT d/o Jonas.
The WILKINSON'S you refer to seem to be non-related WILKINSON'S that settled in Fayette Co. PA and I do not have any information on them other than what you have.
H. Andrew BROWNhabraun2@netscape.net