I have free use of Thornton Perry's Library. Thornton Perry sister was married to the actor Randolph Scott.Randolph Scott was married to Marion Dupont. Randolph Scott and Marion Dupont lived in the James and Dolly Madison's home.
Marion Dupont uncle William Dupont was at West Point with a fellow named Col AC Myers and he was related to Christopher Gist.
The Library contains original books owned by Samuel Washington who was George Washington's brother.The McKees were Torys for sure and before that, seem to be with the French.
Anyway, I have access to the original journals of the first explorers and these journals tell who was related to whom.
They talk about General Lafayette and his family. As you know, General Lafayette as well as Alexander Hamilton both were aids to George Washington and were well conected to Pittsburgh during the Whiskey Rebellion.General Lafayette and Alexander Hamilton attended the wedding of James Madison and Dolly Payne Todd at Samuel Washington's home.The reason is, Samuel Washington was married to Dolly Payne Todds cousin.
So if you leave out George Washington, Queen Alliquippa, Christopher Gist, General Lafayette, Alexander Hamilton, Thomas Jefferson, Meriwether Lewis, Harry Lighthorse Leeand all their extended families both in Pittsburgh and Versailles France, you will find nothing on the McKees.