First Generation:
Phoebe-moon goddess possibly predates Selene. Not much is known about her. Gave birth to the Oracle of Delphi. Seer powers, gave them to Apollo.
Mnemosyne- Goddesss of memory. Had nine children-the Muses-with Zeus. Kings and poets receive their oratorical abilities from her and her daughters.
Rhea- Mother of the Gods Not too much is known about her.
Tethys-Wife of Oceanus and a sea goddess,well known for having a lot of children, over 6,000.
Theia- Just means goddess. Gave eyesight to mankind. Wife of Hyperion. Mother of Helios. Has light based powers?
Themis-Zeus's 2nd wife and daughter of Uranus and Gaia. Goddess of devine law, order, and custom. Represented traditions and customs that had been passed down to the gods. Had the power of prophecy, which she passed to Phoebe. Role of divine justice which she passed onto Nemesis. She was so respected that even Hera called her Lady Themis. Mother of Prometheus in some myths.
Second Generation:
Asteria- Goddess of nocturnal oracles and falling stars. Fled to the sea to escape Zeus. Her island was the only refuge Leo had when fleeing Hera
Asia- Daughter of Oceanus and Tethys, wife of Iapetus. Also credited with being the mother of Prometheus. Mother of Atlas.
Eos/Aurora-Goddess of the dawn. A love goddess before Aphrodite took her role, even cursed by Aphrodite to have unquenchable lust. A possible role of a dawn goddess was to instill the aging process in people.
Leto- Goddess most famous for giving birth to Apollo and Artemis.
Metis- Daughter of Oceanus and Tethys and a goddess of wisdom. God swallowed by Zeus b/c her feared the prophecy that stated that she would have powerful children. She was pregnant w/ Athena when he ate her, which is why Athena had burst out of his head. She lived inside Zeus's head and gave him inspiration.
Selene/Luna- Goddess of the moon, and the moon itself. Apparently she fought against Typhon, which is why the moon has craters.
Styx- She was the first to side with Zeus in overthrowing the titans, so for this her name become a binding oath for gods.
From Wikipedia: Fer Corb ("chariot man"), son of Mug Corb, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after killing his predecessor, and his father's killer, Irereo, in Ulster. He ruled for eleven years, until he was killed by Irereo's son Connla Cáem. The Lebor Gabála Érenn synchronises his reign with that of Ptolemy IV Philopator of Egypt (221–205 BC).[1] The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 330–319 BC,[2] the Annals of the Four Masters to 474–463 BC.[3]
Cob is also a Fomorian king in Celtic legend, but I couldn't find much on him. I posit that the Titan and the Empress are the same character for the sake of convenience. I think the options for titan ladies are thus: Tethys, Asia, Possibly Asteria. I kinda like the idea of Selene, if only b/c of the moon craters coming from a battle. I mean the Fomor do have people from a bunch of different pantheons. Plus, the Norse jotun have been likened to the Fomor as well, so who knows, maybe the titan's army is gonna be full of jotnar?
I also found it interesting that the Fomor are the apparently the enemies of Ireland's first settlers, which to me, makes me think that from the prospective of the settlers, the Formor are the baddies. Which is something that settlers do to the (supposedly in this case) indigenous people when they try to drive them off. Yet Wikipedia tells me that the Fomor had a more complex relationship with the Tuatha De Danann, which, I believe would also be the Sidhe, to the point of intermarrying. So that could also be true for Dresden Files, as some of the fae could have Fomorian ancestors.