Herb PowellHerb Powell is a fictional character on The Simpsons television show. Herb (voiced by Danny DeVito) is Homer's half-brother, a product of an encounter between Homer's father Abraham and a carnival girl. He was put up for adoption shortly after birth, and was kept secret from Homer. However, Herb pulled himself up from the bottom, working his way up (it is a misconception that he went to Harvard) and eventually founding Powell Motors, a car company of which he was CEO. He always found an emptiness in his life, however. Later, after Homer was told of his existence and sought out and found him; he lost his entire fortune and became a homeless person when he unwisely asked Homer to design his new model car for him.
Later, Herb briefly lives in the Simpson household (despite his intense dislike of Homer due to the car fiasco), borrowing some of the family money to develop a device that can analyse baby speech and translate it into English. Herb thus regains his fortune.