(Φοῖβος), i.e. the shining, pure or bright, occurs both as an epithet and a name of Apollo, in his capacity of god of the sun. (Hom. Il. 1.43, 443; Verg. A. 3.251; Hor. Carm. 3.21, 24; Macr. 1.17; comp. APOLLO, HELIOS.) Some ancients derived the name from Apollo's grandmother Phoebe. (Aeschyl. Eum. 8.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890