Save Gender Masculine Usage American (Rare) Pronounced Pron. də-WUWLF [key] Other Forms FormsDeWolf, De Wolf Meaning & History Transferred use of the surname Dewolf. Most notable bearer was American entertainer DeWolf Hopper (1858–1935), best known for his recitations of the famous poem 'Casey at the Bat' by Ernest Thayer (1863–1940).