Crumb is a surname.
Those bearing it include:
George Crumb, composerDavid Crumb, composer son of George CrumbAnn Crumb, actress daughter of George CrumbJason Crumb, Canadian football playerMike Crumb, Canadian football playerRobert Crumb, underground comic artistCharles Crumb, elder brother of Robert CrumbMaxon Crumb, younger brother of Robert CrumbAline Kominsky-Crumb, wife of Robert CrumbSophie Crumb, daughter of Robert Crumb