I can only come up with five: (a) Weasel J. Weisenheimer, a rodent drug dealer created by R. Crumb; (b) The singing of "happy birthday, Mr. Rosenheimer!" in an Act Three nightclub scene in The Bachelor and the Bobby Soxer '47) (c) John Frankenheimer, (d) J. Robert Oppenheimer, and (e) the Munich Rosenheimer Platz metro station. Others?