Peter Lewis Kingston Wentz III was born in Wilmette, Illinois, an affluent suburb of Chicago. His parents are Dale (née Lewis), a high school admissions counselor, and Pete Wentz II, an attorney. Wentz is of English and German descent on his father's side and Afro-Jamaican descent on his mother's side. He has a younger sister, Hillary, and a younger brother, Andrew. His maternal grandfather, Arthur Winston Lewis, served as the U.S. Ambassador to Sierra Leone; Arthur Winston Lewis' cousin is General Colin Powell.