The name of Batman's butler is Alfred Pennyworth. He is a loyal and trusted ally of Bruce Wayne, also known as Batman, and serves as his confidant, mentor, and caretaker. Alfred is a highly skilled butler and has often helped Batman in his crime-fighting endeavors by providing him with support, advice, and even joining him in the field on occasion. Alfred has become an iconic character in the Batman mythology and has been portrayed in various media adaptations of the franchise.