Samuel Ewing and his wife Mary Oldham started out their married life in Cecil County, Maryland. They may have moved to Allegheny County in steps, stopping in Redstone, near Uniontown, Fayette County, Pennsylvania. They were living in North Fayette Township by the time of the 1800 Census but not, as well as can be determined, at the time of the previous 1790 Census. Their son Amos had married by the time of the 1800 Census and is listed separately. Samuel and his son probably settled on land near the current town of Oakland in North Fayette Township that he obtained from his cousin James Ewing (1733-1825).
For a brief, four generation descendancy chart click here.