What's Dr. Doofenshmirtz first name?

Dr. Doofenshmirtz's first name is Heinz. This is revealed throughout the animated television series "Phineas and Ferb," where the character's full name, Heinz Doofenshmirtz, is frequently mentioned. The choice of the name "Heinz" adds to the comedic nature of the character, as it is a common German name and suggests a connection to the famous condiment brand Heinz, known for products like ketchup. The creators of the show likely chose this name to emphasize the character's quirky persona and humorous antics.