Once again, what a super effort on your part - I am still reading - THANKS.
So far the earliest I see is for 1742 for Thomas McKee as mentioned below:
Cathy''s earlier post msg#4186 this board:
Title: The wilderness trail; or, The ventures and adventures of the Pennsylvania traders on the Allegheny path, with some new annals of the old West, and the records of some strong men and some bad ones, by Charles A. Hanna ... with eighty maps and illustrations. Vol. 2. Author: Hanna, Charles A. (Charles Augustus), 1863-1950
pg. 336 THOMAS McKEE, licensed in 1744, 1747; a Trader at Big Island, on the South Branch of Susquehanna in 1742; at Allegheny in 1753; served as a captain in the French and Indian War; father of ALEXANDER McKEE, of Fort Pitt.
I had earlier seen posts that there was a LW&T for this Thomas McKee but have not seen a transcript.The poster said Thomas McKee only mentioned one child and that was Alexander if I recall correctly.These messages that you have so kindly posted also mention that Thomas had a son,James, so I wonder i there were also other heirs or should I say siblings of Alexander and, apparently,James.
So it appears also that there was no close kinship between the McKee at McKeesport and McKee's Rocks.Am I reading that correctly?