Jacob Stonebender, a.k.a. Jake, is the protagonist of the Callahan's Crosstime Saloon books by Spider Robinson. A Callahan's regular, Jake found his way there after the death of his wife and daughter in an auto accident in which their brakes failed...he'd saved some cash by doing the repairs himself, see? In any case, he is also the owner/partner of Lady MacBeth, and a folk/filk singer/composer of no mean merit. Generally the first guy to show up at Callahan's.