Seuss was Theodor Geisel’s middle name.
He initially used it out of necessity in college.
When he was busted for having gin in his dorm room at Dartmouth during Prohibition, Geisel was forced to resign as editor from the school’s humor rag as punishment.
Instead, he called himself “Seuss” and stayed at the paper.
Years later, after some success, he added the “Dr.” to sound more scientific, he claims.
But it became a legitimate title in 1957 when his alma mater awarded Geisel an honorary doctorate.