Sarah Cummins Lancaster Co, PA - Washington Co, PA - Hancock Co, WV

Greetings,
I am searching for any information regarding a Sarah Cummins, b.1770 in Lancaster County, PA and d.1854 in Hancock County, WV. She married Andrew McCown (1767-1856). They lived in Washington County for some time before moving to WV (then VA). I have notes that state she is of scotch ancestry and that her father was probably named John.

The name Cummins is still used in my family today, and I would like very much to know more about her lineage. Any thoughts are appreciated.