Adela \a-de-la\ as a girl's name is pronounced a-DELL-ah. It is of Old German origin, and the meaning of Adela is "noble". Latinate form of Adele, which is from the French Ad?, an ancient name popular in medieval Europe because of the fame of a seventh-century saint, a daughter of the Frankish king Dagobert II. Also the name of William the Conqueror's youngest daughter (11th century). The name died out in England in the later Middle Ages, and was revived in the 19th century, being the name of a character in Johann Strauss's opera "Die Fledermaus". It was also made popular in the 1930s as the name of a character in the novels of Dornford Yates. See also Adelaide and Adeline. Nutritionist Adelle Davic; writer Adela Rogers St. John.