It is of Greek origin, and the meaning of Selena is the moon. From Selene. The name also possibly derives from Celia or the French name Marceline. Mythology: Selena was the moon goddess, sister to Helios, the sun, and companion to the names Diana and Cynthia.Late Latin pop singer Selena. Kreatif forms: Silena, Syllena, Sylna.he name also possibly derives from Celia or the French name Marceline. Mythology: Selena was the moon goddess, sister to Helios, the sun, and companion to the names Diana and Cynthia. Late Latin pop singer Selena. Kreatif forms: Silena, Syllena, Sylna.