McKown's include people with the surname Keon, MacKeon, MacKeown,
MacKewan, MacKoun, MacWing, Hone, MacOwen, Mageown, etc.
They are of Irish descent, from County Sligo.
Samuel and William Keown arrived in Philadelphia, PA between 1840 and
1855, James and Thomas Keon arrived in Philadelphia, PA between 1860 and
1877. Many McKowns in the U.S. are descended from them.