In Greek mythology, Selene
is the goddess of the moon. She is the daughter of the Titans Hyperion and Theia,
and sister of the sun-god Helios, and Eos, goddess of the dawn. She drives her moon chariot across the heavens. Several lovers are attributed to her in various myths, including Zeus, Pan, and the mortal Endymion. In classical times, Selene was often identified with Artemis, much as her brother, Helios, was identified with Apollo. Both Selene and Artemis were also associated with Hecate, and all three were regarded as lunar goddesses, although only Selene was regarded as the personification of the moon itself.
Her Roman equivalent is Luna.
https://en.wikipedia.org/wiki/Selene
Eos: In Greek mythology, Eos is a Titaness and the goddess of the dawn, who rose each morning from her home at the edge of the Oceanus.
Eos had a brother and a sister,
Helios, god of the sun, and Selene, goddess of the moon.
https://en.wikipedia.org/wiki/Eos
Helios was the personification of the Sun in Greek mythology. He is the son of the Titan Hyperion and the Titaness Theia (Hesiod) (also known as Euryphaessa (Homeric Hymn 31))
and brother of the goddesses Selene, the moon, and Eos, the dawn.
https://en.wikipedia.org/wiki/Helios
There are three distinct deities seen in the Dawn trailer like you've pointed out.