Jeff Weaver: "John Hash who ended up on New River was by best guess born in Anne Arundel or Baltimore Co., MD, probably son of Darby Hash and Juda Iscar. "Old John" (ca. 1717-1784) lived in Baltimore County, Maryland until the mid-1750s (might be a bit later, I dont have the references in front of my face) when he lit out. His wife is widely reported to be Rebecca Anderson (who most of us don't really believe). His son (sometimes reported to be a brother) William Hash married Ellender Osborne, generally believed to be a daughter of Ephraim Osborne and thus sister of Captain Enoch Osborne. There are reams and reams of erroneous materials on the Hash family on the internet.
http://www.newrivernotes.com/historical_early_settlers_1774_lord_dunmore_war.htm#HashJ