One thing I have noticed is that Selene is sometimes referred to as Phoebe and Helios is sometimes referred to as Phoebus.
Propertius, Elegies 2. 15 (trans. Goold) (Roman elegy C1st B.C.) :
"It was naked that Endymion enraptured Phoebus's sister [Phoebe-Selene] and naked, they say, lay with the goddess."
"So does starlight splendour wane with the coming of the sun, and the huddled flock of the Pleiades vanish away when Phoebe [Selene the Moon], shining with borrowed light [i.e. from the sun], with encircling horns encloses her full-orbed disk."
"Thou [Helios the Sun], greatest glory of the unclouded sky . . . and thou, his sister, ever faring opposite to thy brother, Phoebe [Selene the Moon], night-wanderer."
"As much fairer does thy beauty shine as gleams more brightly the full-orbed moon when with meeting horns she has joined her fires, when at the full with speeding chariot blushing Phoebe [Selene the Moon] shows her face and the lesser stars fade out of sight."
Statius, Thebaid 1. 105 ff (trans. Mozley) (Roman epic C1st A.D.) :
"When Atracian [Thessalian witches'] spells make travailing Phoebe [Luna-Selene the Moon] redden through the clouds; suffused with venom, her skin distends and swells with corruption; a fiery vapour issues from her evil mouth, brining upon mankind thirst unquenchable and sickness and famine and universal death."
This is probably due to their conflation with Apollon and Artemis (Apollon because of his most iconic and we'll used epithet Phoebus and Artemis sometimes being called Phoebe) but still, it's pretty cool in my eyes.