If you knew anything about the north, you'd know Yankees are people from north and east of Pennsylvania, and their kin in Michigan, Wisconsin, and Minnesota who went west. Pennsylvania, Ohio, Indiana, and Illinois, are all very distinctly not Yankee, mostly because they are very German and non-English. (To be fair, part of the far northern strip of these three states is probably Yankee.) Yankees are Episcopalians and Congregationalists - two very weak denominations here. Pennsylvanians are mostly Catholics, Presbyterians, Lutherans, and Methodists.
I don't know of any Pennsylvanians who would describe themselves as Yankees (we use that term to describe people from northern NJ, NYC, upstate NY, and New England), while I believe that Pennsylvanians do fly as many Confederate Flags as down south, and we are the nation's leading state in the consumption of snuff and chewing tobacco. Its not for no reason that Pennsylvania is described as Philadelphia and Pittsburgh with Alabama in between. And our neighbors in southern New Jersey are definitely not Yankees.
Pennsylvania and Ohio are most similar to Virginia, North Carolina, and western Tennessee - essentially Appalachia.
Only in the earliest sense of the term. Yankee first meant anybody northeast of New York State (meaning new england). It gradually came to encompass New York State and by the time the pre-civil war sectional divisions set in around 1840-50 was taken to refer to that north of the Mason Dixon line. The civil war and reconstruction pretty much set that line in stone.
That does not mean non-yankee people don't still live in rural PA or even NY. They do, and many are quite similar to their southern neighbors. But their states are still part of yankeeland and have been since about 1860.