I am not sure if you already have this data.The information below the next paragraph is confirmed through the DAR. Please email me privately if you want some additional information (firstname.lastname@example.org).
I also found data (unconfirmed) at Rootsweb in the Hindman-L archives (Archiver > HINDMAN > 2002-08 > 1030359774, From: "James Hindman" Subject: [HINDMAN] Descendants of David HINDMAN/Agnes LINVILLE, from notes of Crawford HINDMAN 1820-1898 Date: Mon, 26 Aug 2002 12:02:54 +0100).
I found sons of John McKee and Martha Hindman - David and James.John served in the Revolutionary War as a private under Capt. Edward Graham, 5th Batt. and in the Cumberland Militia.
John McKee born on 5-Jan-1761 at Northern Ireland; died at Perry Co PA on 17-Feb-1847 and his (1st) wife Martha Hindman born on 9-Jun-1765 at Cumberland Co PA; died at Perry Co PA on 18-Jun-1852 married on 5-May-1789.
Son James married Sarah McKnight.Their daughter Maria McKee married David K. Gillespie.Maria and David's son William H. Gillespie married Luella D. Raynor.
Son David married Nancy Reed.Their daughter Martha married William Giffin.Martha and William's son Winfield Scott Giffin married Elizabeth Ellen Heymann.