There are several synonyms for the name Theodor Seuss Geisel, including Dr. Seuss, Ted Geisel, and Theo LeSieg. Dr. Seuss is perhaps the most well-known and commonly used synonym, as it was the pen name Theodor Seuss Geisel used for his popular children's books. Ted Geisel was his given name, which he sometimes used in professional settings, as well as in his personal life. Theo LeSieg was another pseudonym used by Geisel, which is simply his last name spelled backwards. Overall, these synonyms all refer to the same beloved author, illustrator, and cultural icon whose stories and illustrations have entertained and inspired generations of children.