Yes I do believe John McKee who married Sally Riddick was the founder of McKeesport.That is what the John McKee's grave stone says at Versallies.I don't believe I wrote that Robert mckee was the founder.That item was in the record I found.
I believe all the St Clair/Sinclair family came from the East.Samuel Sinclar was a surveyor and Kentucky needed to be surveyed.
I found another article
THE HISTORY OF CLAIRTON, PA
The following is from "Early History of The Peters Creek Valley and The First Settlers Compiled by Noah Thompson 1973 - 1974
Land occupancy in the Clairton Area began in the third quarter of the eighteenth century. The first survey record—that of Benjamin Kirkindall (or Kuykendahl)—is dated September 27, 1769. It resulted in the “Ravensburg” patent granted to Sarah and Moses Kirkindall (Kuykendahl) on February 10, 1791. This patent covered lands in the northern or, as later known, Wilson district of the area. A second tract, toward the west, was surveyed for Moses Kirkindall (Kuykendahl) on December 8, 1783, but was not granted until December 26, 1822, when, as the “Gamaliel” patent, it became the property of John Gormly. A third tract, in the southerly part of the area, was surveyed by Samuel St. Clair, September 8, 1784, and under the title of the “Bruce” patent was conveyed to Samuel Willie (Wylie) on September 22, 1788. A fourth tract, surveyed for John King on July 7, 1783, was granted by the “Concord” patent to John McIhany on September 20, 1787.
I believe Samuel Sinclair's other children are buried about 200 ft away with the Bruce, Stewart, Wolfe, Lewis and Hamilton families of Alexander Hamilton.Col Alexander Hamilton's 1794 Whiskey Rebellion Headquarters was located in McKeesport. Caption Meriwether Lewis was Col Alexander Hamilton's aid.
I am not sure of the complete family of General Arthur St Clair at this time but I am working on it.