entity_id,source_id,evidence_type,source_note ENT_CETO,SRC_APOLLODORUS_LIBRARY,scholarly attestation,Library 1.2.6; daughter of Pontus; wife of Phorcys; mother of Gorgons and Graeae ENT_CETO,SRC_HESIOD_THEOGONY,direct attestation,"Theogony 238, 270-336: Ceto (whale-sea) is a daughter of Pontus and Gaia; married her brother Phorcys; their offspring are the great monsters of the Greek mythological tradition: the Graiai (Pemphredo and Enyo), the Gorgons (Stheno, Euryale, and Medusa), and the serpent guarding the Hesperides' apples; Hesiod is the primary ancient source for Ceto's genealogical role" ENT_CETO,SRC_THEOI_DAIMONES,index attestation,Attested in Theoi Sea Gods index. ENT_CETO,SRC_THEOI_HOME,index attestation,"Attested in Theoi Project index (Greek gods, spirits, heroes in classical literature)." ENT_CETO,SRC_THEOI_SEA,index attestation,Literary attestation in classical/mythographic tradition; cult evidence varies by entity.