I have been researching Daniel Jones who married (prob by 1778) Mary Brown, daughter of James and Nancy Brown of Fairfield/Donegal Townships, Westmoreland County. Daniel appears in Unity Twp in 1790, but in 1798 is living with the Brown clan on land just southeast of old Ft Ligonier. The land is located in both Fairfield and Donegal Twps. I have tax rolls for Donegal 1802-1820 and your Thomas appears in them. Also, a James Jones, I believe. Are Daniel and Thomas related? And is this James Daniel's son? Related names are Brown, Jones, Taylor, McKinzie, Yates, Lafferty, and Freeman.