They're all from the Aeneid! Creusa was
Aeneas's first wife - a Trojan woman, therefore, and a pillar of society.
Elissa and
Dido are one and the same Carthaginian queen, with whom
Aeneas almost has a fling, for which she never forgives him. And once he's settled down in Italy, he cements an alliance with the local leader by marrying his daughter
Lavinia. The only woman I can think of who appears in the poem but not in this post is, of all names,
Camilla - she fought against
Aeneas's troops and was a formidable opponent, but of course doomed to failure in the circumstances.