Depends on how far up, or out onto the branches of the family tree you want to venture.
Johnny Cash, the singer, was a distant cousin.
Cash's Depot, a historical location in Chesterfield County, SC, was named for the Cash family who were settled there. We are all related. The patriarch of the family, Colonel E. B. C. Cash, fought the last legal duel in SC.
Cash-Shannon Duel Marker
If you go far enough up the tree, you find ancient Kings of Scotland.
Don Cash Thesis