Phaethusa

ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger

Latin > English (Lewis & Short)

Phăĕthūsa: ae, f., = Φαέθουσα (the shining one),
I a sister of Phaëthon, Ov. M. 2, 346.