In Greek mythology, four people had the name Creusa. Greek mythology comprises the collected legends of Greek gods and goddesses and ancient heroes and heroines, originally created and spread within an oral-poetic tradition. ...
According to Pindar's 9th Pythian Ode, Creusa was a naiad and daughter of Gaia who bore Hypseus, King of the Lapiths to the river god Peneus. Hypseus had one daughter, Cyrene. When a lion attacked her father's sheep, Cyrene wrestled with the lion. Apollo happened along and immediately fell in love with her and kidnapped her. He took her to North Africa and founded the city of Cyrene in her name. The region, Cyrenaica, is also named for her. Together, she and Apollo had one son: Aristaeus.
Daughter of King Creon of Corinth, Greece. After Jason divorced Medea, he married Creusa. Medea got even by giving Creusa a cursed dress that stuck to her body and burned her to death as soon as she put it on.
Daughter of Priam, wife of Aeneas, mother of Ascanius. In Virgil's Aeneid she died escaping from Troy during the sack of Troy by the Greeks.
Daughter of Erechtheus, mother of a son Achaeus, a daughter named Diomede, and presumably another son Ion according to Hesiod's Eoiae but according to Euripides' Ion she was mother of Ion by Apollo and of Achaeus and Dorus by her husband Xuthus.
Creusa 1's instructions to her prospective minister were clear: to drop the poison of Athena into Ion 1's cup (and not into the general bowl) in the banquet's pause, when Xuthus 1 and the other guests were pouring wine to the gods.
This is how Creusa 1 proved that she was Ion 1's mother; and he, having been adopted by Xuthus 1, found a new home in Athens, not as the son of an alien (which he had feared), but as full member of the royal family.
Creusa 1 was daughter of King Erechtheus of Athens and Praxithea 4, daughter of Phrasimus and Diogenia 1.